An airbag apparatus for a vehicle includes an airbag having a left airbag section and a right airbag section inflatable at left and right sides in a front area of an occupant, a retainer for retaining the airbag, and a first deployment-limiting sheet having one end coupled to the airbag or the retainer. The first deployment-limiting sheet at least partly overlaps the airbag and extends along the airbag from a rear portion to a front portion of the airbag. The first deployment-limiting sheet extends along the rear portion of the airbag during inflation thereof.