Skip to content
Can I Carry It? — verified carry-on guide

飛行機にPocket Knifeを持ち込める？

用具・その他

要約結論
機内持込: ✕ 不可 受託手荷物: ✓ 可能

No — you cannot bring pocket knife in carry-on luggage through security checkpoints. Carry-on: never, regardless of blade length.

  • · Carry-on: never, regardless of blade length
  • · Rounded-blade butter knives + plastic cutlery: allowed
  • · Checked: sheath or wrap sharp edges
  • · Multi-tools with any knife blade: checked only · bladeless multi-tools: carry-on OK
  • · Multi-tool scissors under 4 in (from pivot): carry-on OK
On this page · 5 sections

航空保安当局別の公式規定

Rules by security authority

United States — TSA

Carry-on

No

No. Knives of any size are banned in the cabin — the only exceptions are rounded-blade butter knives and plastic cutlery.

Checked bag

Yes

Yes. Knives are fine in checked bags as long as they are sheathed or securely wrapped to protect baggage handlers and inspectors.

Rule conditions: Carry-on: never, regardless of blade lengthRounded-blade butter knives + plastic cutlery: allowedChecked: sheath or wrap sharp edgesMulti-tools with any knife blade: checked only · bladeless multi-tools: carry-on OKMulti-tool scissors under 4 in (from pivot): carry-on OK

Flying internationally? Security follows the country you depart from — the authority above applies at your departure airport. Customs at arrival is separate.

Pocket Knifeのパッキング注意点

機内持ち込み手荷物: No. Knives of any size are banned in the cabin — the only exceptions are rounded-blade butter knives and plastic cutlery.

受託手荷物（預け荷物）: Yes. Knives are fine in checked bags as long as they are sheathed or securely wrapped to protect baggage handlers and inspectors.

保安検査場での最終的な持ち込み可否判断は、現場の保安検査員に委ねられます。

よくある質問 (FAQ)

Frequently asked questions

Can you bring a Pocket Knife in a carry-on?

No. Knives of any size are banned in the cabin — the only exceptions are rounded-blade butter knives and plastic cutlery.

Can you pack a Pocket Knife in checked luggage?

Yes. Knives are fine in checked bags as long as they are sheathed or securely wrapped to protect baggage handlers and inspectors.

Can I bring a Swiss Army knife on a plane?

Not in the cabin — any knife blade makes it prohibited there, whatever the length. It travels fine in checked luggage, sheathed or wrapped.

Can I bring a multi-tool (Leatherman) on a plane?

Without a knife blade, yes — bladeless multi-tools are allowed in carry-on, and scissors under 4 inches are fine. One blade of any size sends it to the checked bag.

Last verified:

Verified against official sources. Rules change — for high-stakes items, confirm with your airline and the screening authority. Our verification method →