An adjustable strike plate for locks of the type that comprises at least one profiled plate, substantially rectangular, provided with at least one through opening and with means for fixing to a jamb, further comprising - an upper plate and a lower plate, the width of said at least one opening of said lower plate being substantially less than the width of said opening of said upper plate, said at least one opening of said lower plate, in the installation configuration, being substantially comprised within the outline of said at least one opening of said upper plate; - at least one adjustment unit arranged between said upper plate and said lower plate for the selective translational movement of said lower plate with respect to said upper plate; - said upper plate comprising a seat for the movable reception of said unit when the outer surface of said upper plate is coplanar with the outer face of said unit, said unit comprising at least one protrusion which is inserted in a respective seat of said lower plate; a movement of said unit producing a shift of said protrusion and, consequently, of said lower plate with the modification of the position of the opening of said lower plate with respect to the opening of said upper plate, said adjustment unit comprising an eccentric cam, said cam resting against the inner profile of said seat, a movement of said cam causing the translational movement of said lower plate between a first limit configuration where said opening of said lower plate is in proximity to a first lateral edge of the opening of said upper plate, and a second limit configuration where said opening of said lower plate is in proximity to a second lateral edge of the opening of said upper plate, characterized in that it further comprises at least one abutment apparatus, arranged underneath said lower plate, which has a threaded hole, said hole accommodating a shank of a screw the head of which is arranged in an eyelet defined in said upper plate, the rotation of said screw making it possible to stably couple the upper plate 5 to the abutment apparatus. - an upper plate and a lower plate, the width of said at least one opening of said lower plate being substantially less than the width of said opening of said upper plate, said at least one opening of said lower plate, in the installation configuration, being substantially comprised within the outline of said at least one opening of said upper plate; - at least one adjustment unit arranged between said upper plate and said lower plate for the selective translational movement of said lower plate with respect to said upper plate; - said upper plate comprising a seat for the movable reception of said unit when the outer surface of said upper plate is coplanar with the outer face of said unit, said unit comprising at least one protrusion which is inserted in a respective seat of said lower plate; a movement of said unit producing a shift of said protrusion and, consequently, of said lower plate with the modification of the position of the opening of said lower plate with respect to the opening of said upper plate, said adjustment unit comprising an eccentric cam, said cam resting against the inner profile of said seat, a movement of said cam causing the translational movement of said lower plate between a first limit configuration where said opening of said lower plate is in proximity to a first lateral edge of the opening of said upper plate, and a second limit configuration where said opening of said lower plate is in proximity to a second lateral edge of the opening of said upper plate, characterized in that it further comprises at least one abutment apparatus, arranged underneath said lower plate, which has a threaded hole, said hole accommodating a shank of a screw the head of which is arranged in an eyelet defined in said upper plate, the rotation of said screw making it possible to stably couple the upper plate 5 to the abutment apparatus.