An airbag device includes an airbag, an inflator and a plurality of contact projections for horn switch which are held by a retainer, such that switching operation can be performed with respect to a steering wheel. When the contact projections for the horn switch are brought into contact with contact receiving portions of the steering wheel in response to a tilt operation according to a press by a driver, the horn are blown. Horn switch contacts are respectively provided in a plurality of contact members so as to be spaced from each other in a predetermined configuration, and each contact member is electrically connected to each other via the inflator.