Airbag device for saddle-type vehicle

An airbag device for a saddle vehicle which includes an inflator having an opening, and an airbag that is connected to an inside of the inflator through the opening and is deployed with a gas released by the inflator, the airbag device comprising:

• a first restriction portion that restricts separation between the inflator and the airbag when the airbag is deployed, wherein
• the first restriction portion has an elastic member positioned inside the inflator,
• when the inflator releases a gas having a predetermined first gas release pressure, the elastic member is increased in diameter due to the gas pressure of the inflator, and the inflator and the elastic member enter a locked state, so that the first restriction portion restricts separation of the airbag, and
• when the inflator releases a gas having a predetermined second gas release pressure lower than the first gas release pressure after the gas having the first gas release pressure is released, the elastic member is decreased to have a diameter smaller than the diameter in the locked state, and the locked state is canceled, so that the first restriction portion releases restriction on separation of the airbag.