飛行機にCO₂ Cartridgesを持ち込める？
No — you cannot bring co₂ cartridges in carry-on luggage through security checkpoints. Bike/sodastream/airsoft CO₂: banned both bags.
- · Bike/sodastream/airsoft CO₂: banned both bags
- · Life-vest exception: ≤ 2 installed + 2 spares (special instructions)
- · Empty cylinders: allowed
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 — filled CO₂ cartridges are banned from the cabin.
Checked bag
No
No — banned from checked bags too; only empty cylinders, or a life-vest kit (≤ 2 installed + 2 spares), fly.
Flying internationally? Security follows the country you depart from — the authority above applies at your departure airport. Customs at arrival is separate.
CO₂ Cartridgesのパッキング注意点
機内持ち込み手荷物: No — filled CO₂ cartridges are banned from the cabin.
受託手荷物（預け荷物）: No — banned from checked bags too; only empty cylinders, or a life-vest kit (≤ 2 installed + 2 spares), fly.
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 CO₂ Cartridges in a carry-on?
No — filled CO₂ cartridges are banned from the cabin.
Can you pack CO₂ Cartridges in checked luggage?
No — banned from checked bags too; only empty cylinders, or a life-vest kit (≤ 2 installed + 2 spares), fly.
Can I bring bike CO₂ cartridges on a plane?
No — filled CO₂ cartridges are banned from both carry-on and checked baggage. Carry the inflator head empty and buy cartridges after landing.
Are soda siphon cylinders allowed?
No — charged soda/CO₂ cylinders fall under the same compressed-gas ban. Empty ones are fine.
What about life jacket CO₂ cartridges?
That’s the one exception: up to two cartridges inside the vest plus two spares, per TSA/FAA special instructions and airline notification.
Last verified:
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