The invention relates to an expansion rivet comprising a holding element (1) provided with a bearing plate (2) and limbs (7), and an actuating part (11) provided with a head plate (12) and a shaft (13). The head plate (12) is arranged on the bearing plate (2) in a fixing position. The limbs (7) are outwardly splayed by the engagement of expansion projections in an active region. At least one projecting catch (17) is arranged on the shaft (13), said catch being inclined in a flat manner with a sliding surface (18) away from the head plate (12), and vertically facing the head plate (12) with a rear catch surface (19). The expansion rivet can be thus very easily detached and reused once the actuating part (11) has been inserted into the holding element (1), the head plate (12) being detached from the bearing plate (2) and the actuating part (11) removed in the opposite direction to the insertion direction, until the or each rear catch surface (19) comes into contact with the bearing plate (2) and the expansion rivet can be removed.