Abstract: A fuel injector (1) for fuel injection systems of internal combustion engines is composed of a solenoid coil (8), an armature (21) acted upon in a closing direction by a return spring, and a valve-closure member frictionally connected to the armature (21). The valve-closure member, together with a valve-seat surface, forms a sealing seat, the armature (21) striking with an armature stop face (42) against a magnetic-pole surface (44) of a magnet body (42). The armature stop face (42) has a first annular, inner edge zone (31a) that adjoins an inner edge (47) and is inclined inwardly with respect to a plane perpendicular to longitudinal axis (30) of the armature (21), and has a second annular, outside edge zone (31b) that adjoins an outer edge (46) and is inclined outwardly with respect to a plane perpendicular to the longitudinal axis (30) of the armature (21).