Airbag device

An airbag device of which a trim of a vehicle is attached to a periphery, the airbag device comprising:

• a folded airbag;
• an attachment member configured to house the folded airbag and to be fixed to the vehicle;
• and
• an airbag lid including a main body portion and a protruding support portion, the main body portion being connected to the attachment member in a state of covering the folded airbag from a side opposite to the attachment member, the protruding support portion protruding from the main body portion, at least a part of the protruding support portion being covered by the trim,
• wherein the protruding support portion includes:
• a base end side edge portion joined to the main body portion;
• a tip end side edge portion provided on a side opposite to the base end side edge portion;
• a locking portion attaching to the trim and provided between the base end side edge portion and the tip end side edge portion;
• and
• a reinforcing portion provided continuously along the tip end side edge portion.