New Trip 編集部　更新日: 2026.07.16

Choosing a suitcase for a family of three: Capacity guidelines and two recommended options that won't disappoint

Title

When traveling with a family of three, you will end up with more luggage than you imagine, including clothes, daily necessities, and children's equipment.

When packing, the question of "Should I pack everything into one big unit or split it into two units?"

It's a choice that many families face.

In this article, we will explain how to choose the best suitcase for a family of three.

We will explain some tips to reduce the burden of travel and make your trip more comfortable.

We will also introduce recommended models that meet the latest needs.

Title

table of contents

1. How to choose the best suitcase for a family trip

二、3人家族のスーツケース選びで重視したい5つのポイント

2. Recommended suitcases for family trips

3. Tips for packing and storage for a family trip

4. Summary

六、よくある質問（FAQ）

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一、3人家族のスーツケースは何個必要？泊数別の容量目安

3人家族のスーツケースは、泊数と移動手段によって最適な組み合わせが変わります。

旅行期間 荷物量 おすすめの組み合わせ 向いている移動手段
1〜2泊 少なめ Mサイズ1台（約60L） 電車・新幹線・車
3〜5泊 標準 Lサイズ1台（80〜100L）またはMサイズ2台 電車ならL1台、車ならM2台
6泊以上 多め Lサイズ＋機内持ち込みサイズ、またはLサイズ2台 飛行機・長期旅行

1〜2泊の短期旅行

荷物量：
着替えが少なく、子どもの荷物も最小限で済みます。

おすすめ：
Mサイズ1台（約60L前後）

理由：

  • 家族3人分の荷物をまとめて管理しやすい
  • 電車や新幹線での移動も負担にならない
  • ホテルの部屋でもスペースを取らない

週末旅行や帰省など、短期の旅行ならMサイズ1台で十分対応できます。

3〜5泊の旅行

3人家族で最も迷いやすいのがこのケースです。

おすすめの組み合わせ：

  • Lサイズ1台（80〜100L程度）
  • Mサイズ2台

迷ったら、「移動手段」を最優先に考えるのがおすすめです。

電車や新幹線移動が多いなら、改札や車内移動を考えてLサイズ1台。

車移動が中心なら、重量を分散できるMサイズ2台が便利です。

6泊以上・海外旅行

荷物量：
衣類が増え、お土産や子ども用品もかさばります。

おすすめ：

  • Lサイズ＋機内持ち込みサイズ
  • Lサイズ2台

理由：

  • 衣類や日用品が大幅に増える
  • お土産を入れるスペースが必要
  • 子どもの着替えやおむつなど、荷物が多くなりやすい

飛行機での移動が中心なら、重量制限を考えて2台に分けた方が安心です。

Title

📚まとめ：3人家族の場合、人数だけでスーツケースの数を決めるのではなく、「泊数」と「荷物量」に合わせて選ぶことが大切です。

Title

二、3人家族のスーツケース選びで重視したい5つのポイント

To make a trip comfortable for a family of three, it's important not to just choose a large one, but to check the "five points" that take into account your means of transportation and ease of use.

収納力：家族分の荷物をまとめやすいか

For a family of three, the amount of space you need will vary depending on your packing style.

Generally, the recommended amount is 10 to 20 liters per person per night .

When traveling with your family, your luggage will likely swell more than you expected, with extra clothes for your children, diapers, sandals, winter clothes, and more.

  • Short trips of 2-3 nights: Around 80-100L. It is common to have one large bag or two medium-sized bags (approximately 60L).
  • Long-term trips of 4 nights or more: 120L or more. Combining a main L-size bag with a carry-on bag for items you want to access quickly is a good balance between ease of travel and storage capacity.

軽量性：大きいサイズでも移動しやすいか

The suitcases that hold the family's belongings

It must be robust enough to withstand harsh environments, yet easy to carry.

  • 100% Polycarbonate (PC): Extremely lightweight and resilient, it easily recovers its shape even after being subjected to impact. Models made of 100% PC, such as the 0502, are highly durable and will preserve your family's memories for years to come.
  • ABS+PC Blend: This material used in the 0211 combines the hardness of ABS with the toughness of PC. It is resistant to deformation and offers excellent cost performance, making it ideal for homes with growing children.

キャスター性能：重い荷物でも快適に運べるか

One thing that is surprisingly often overlooked is the "depth of the contents" when you open the case.

  • Large-capacity, 3:7 Rectangular Design: While traditional 5:5 split compartments require items to be packed evenly on both sides, models like the 0211, which use a 3:7 ratio, have an extra-deep side. This offers the major advantage of being able to store thick items like children's toys, shoe boxes, or bulky winter clothes without losing their shape.

移動中の使いやすさ（ストッパー・フック）

It is not uncommon for a suitcase filled with luggage for three people to weigh over 20kg.

The casters that support this weight are the most important part and determine how tired you will be during your trip.

  • Stable 5-wheel design: In addition to the usual 4 wheels, this type has an auxiliary wheel (5th wheel) in the center, so the bottom is less likely to bend even when heavy loads are loaded, and it can be operated with surprisingly little force.
  • Pursuing quietness: When leaving early in the morning or moving through quiet residential areas, the noise of the wheels can be a concern. High-quality quiet casters like those made by HINOMOTO minimize rattle noise, allowing for stress-free movement.

荷物の増減に対応できる機能（拡張機能）

Be sure to check out the additional features that will make your family trip dreams come true.

  • Caster stoppers: When traveling by train or bus, it can be difficult to hold a heavy suitcase while holding your child's hand. One-touch locking caster stoppers significantly increase safety.
  • Capacity expansion: As you return home, you'll likely end up with more souvenirs. With the expandable feature, you can expand the gusset by simply opening the zipper, eliminating the need for an extra bag.
  • Hook smartphone stand: This gimmick allows you to prop up your smartphone to show your child a video while you're waiting, or hang a bag you've purchased on the hook, subtly reducing the burden on parents.
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三、3人家族におすすめのスーツケース｜シーン別の選び方

収納力重視なら｜New Trip 0211

The "0211" model is ideal for families who want to pack all of their belongings into one vehicle and transport them powerfully.

Easily carry thick luggage! "3:7 large capacity square design"

While a typical suitcase splits in half down the middle, the 0211 has a deep, box-like structure with a lid section measuring 3cm and a storage section measuring 7cm. This depth is a great asset for family trips. Thick children's shoes, bulky toys, and thick winter coats can all be stored right to the bottom without losing their shape.

"Five wheels and caster stoppers" that can support the weight of three people

Packing the suitcase with luggage for a family of three can be quite heavy, but the "fifth wheel (training wheel)" located in the center of the bottom prevents the bottom from sagging and supports stable movement. It also comes equipped with caster stoppers (brakes), so you don't have to hold the suitcase down with your feet while holding your child's hand when traveling by train or bus.

Tough body and convenient hook

The bag is made of impact-resistant ABS and PC materials and is treated to make scratches less noticeable. It also has a hidden hook for hanging small items, which is useful on family trips where you tend to bring lots of souvenirs and drinks.

New Trip 0211

New Trip 0211 スーツケース

M・68L/L・105L｜ABS+PC

五輪設計 TSAロック 大容量設計 物掛けフック

¥24,580~

商品を見る

移動の快適さ重視なら｜New Trip 0502

"0502" is recommended for families who prioritize "quietness" and "convenience" while traveling and want to minimize stress for parents.

HINOMOTO Silent Casters: Incredibly quiet operation

The stroller is equipped with silent casters made by the Japanese manufacturer Hinomoto Lock. Whether you're leaving early in the morning, coming home late at night, or navigating a quiet hotel hallway, the noise is reduced, allowing for smooth movement. Even while carrying a sleeping child, you can move the stroller smoothly without worrying about noise.

"Capacity expansion" feature means you don't have to worry about bringing back souvenirs

It's a common occurrence on family trips: souvenirs pile up on your travels and your bag won't close. The 0502 features an expandable gusset that expands just by opening the zipper. This increases storage capacity, so you can head home light without needing to buy a second bag.

"Smartphone stand" and "zinc alloy corner pad" to make waiting time more comfortable

While waiting at the airport or station, your child won't get bored by watching videos on the built-in smartphone stand. The corners are also padded with zinc alloy to protect the contents of your luggage even during rough handling during travel.

New Trip 0502

New Trip 0502 スーツケース

M・65L/L・100L｜100%PC

HINOMOTO静音キャスター 拡張機能 TSAロック スマホスタンド

¥22,980~

商品を見る
Title

四、3人家族旅行のパッキングを楽にする収納術

Once you've chosen your suitcase, the next step is to pack it.

Here are two tips for storing luggage for three people efficiently and without getting lost while traveling.
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五、まとめ

Choosing a suitcase for a family of three is not just about choosing the size.

"How can we free up mom and dad's hands while they're on the move?" "How can we store our ever-increasing luggage in a smart way?"

This is an important decision that will affect the quality of your trip.

  • If you prioritize storage capacity and stability , then the "0211" is the one for you, with its deep 3:7 structure and five casters.
  • If you are looking for comfortable mobility and versatility , choose the "0502" with HINOMOTO silent casters and expansion functions.

Find the perfect partner for your family in 2026 with New Trip.

With proper preparation, even travel time can become a fun and memorable part of your family life.

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よくある質問（FAQ）

Q1. 3人家族なら何Lのスーツケースが必要ですか？

A1：泊数によって異なります。
1〜2泊ならMサイズ（60L）、3〜5泊ならLサイズ（80〜100L）、6泊以上ならLサイズ2台が目安です。

Q2. 3人家族でスーツケース1台で足りますか？

A2：3〜5泊程度なら、Lサイズ1台で十分対応できます。
ただし、荷物が多い家庭や車移動が中心の場合は、Mサイズ2台に分けた方が荷物を整理しやすく、移動も便利な場合があります。

Q3. 子どもが小さい場合、スーツケースは何個がおすすめ？

A3：子どもが小さいうちは、親が荷物をまとめて管理できる「1台」がおすすめです。
子どもが自分で荷物を持てる年齢（小学生以上）になったら、2台に分けることで管理しやすくなります。

Q4. 家族旅行でスーツケースを選ぶときの優先順位は？

A4：①泊数、②移動手段、③子どもの年齢、④お土産の量、の順で考えると選びやすくなります。
特に家族旅行では、容量だけでなく移動時の扱いやすさも重要です。

Q5. 3人家族でLサイズ1台とMサイズ2台、どちらが便利？

A5：電車・新幹線移動ならLサイズ1台がおすすめです。改札や車内での移動がしやすくなります。
車移動ならMサイズ2台がおすすめで、荷物を分散できるため持ち運びの負担を減らせます。

執筆・監修

New Trip編集部
本記事は、スーツケース・旅行用品ブランド「New Trip」の編集部により制作されました。
製品開発やユーザーの声を活かしながら、ユーザーに合ったスーツケースや、旅行・出張をより快適にするアイテムを発信しています。

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