The invention relates to a hinge arrangement for an airbag flap hinged to a dashboard. The motor vehicle dashboard body (1) is provided with an opening closed by a flap (4), both the opening and the flap being defined by an outline (3) that is generally rectangular, the flap being suitable for opening so as to allow an airbag to be deployed. It is further provided with one or more linear ties (11-14) fastened to one face of the dashboard body and to one face of the flap, in such manner that segments (43, 44) of linear ties straddle a portion (6) of the outline that extends transversely relative to the vehicle on which the dashboard is to be mounted, in order to constitute or reinforce a hinge (AX) via which the flap is hinged to the dashboard body. The invention relates to motor vehicle safety.