The decorative panel provided at the instrument panel includes the protruding portion that is engaged with the engagement hole of the airbag door, in a state in which the distal end portion protrudes from the rear surface of the airbag door, and the door decorative portion that is formed integrally with the protruding portion and attached to the front surface of the airbag door by engaging the protruding portion with the engagement hole. The protective plate that includes the protective portion covering the distal end portion of the protruding portion from the airbag side is provided at the rear surface of the airbag door. When the airbag is inflated and deployed, the airbag is prevented from interfering with the distal end portion of the protruding portion.