The invention relates to a dashboard (1) for an automobile, of the type that comprises a lower-resistance line defining a flap (4) to be opened under the pressure generated by the expansion of an airbag (10) upon an impact to the automobile, said flap including a wall (18) having an inner surface (24) on the side of a housing (8) containing the airbag, and an outer surface (26) opposite the inner surface, characterized in that it comprises a pattern (6) with which the flap is brought into contact upon the opening thereof, and in that the wall of the flap includes at least one breaking primer (40) located in the vicinity of a contact point (P) between the flap and the pattern, for breaking the wall into several parts.