An airbag apparatus for a motorcycle having a steering handle mounted so as to be capable of rotating with respect to a head pipe mounted at the front end of a main frame is capable of being mounted after assembly, e.g., as an after-market add-on or retrofit to an existing vehicle, or during vehicle assembly or manufacture. An airbag mounting member is mounted so as to extend from the main frame toward the front of the vehicle body across a central axis of rotation of the steering handle and a top bridge of the main frame. An airbag module is mounted on the airbag mounting member so that the upper portion of the airbag module is covered by a covering member.