AIRBAG DEVICE

An airbag device includes an airbag inflated by an inflation gas flowing into the airbag to protect an occupant seated in a seat on a vehicle. The airbag includes a bag main body and a control member. One end portion of the control member is connected to the bag main body by being sewn to the bag main body using a conductive thread. The control member controls an inflation state of the bag main body by maintaining or releasing a connected state of the one end portion of the control member to the bag main body using the conductive thread. The conductive thread is electrically connected to a control device. The connected state between the one end portion of the control member and the bag main body is released by dividing a predetermined portion of a sewn portion due to energization of the conductive thread.