A padlock including a lock body, a shackle having two shanks with grooves for receipt of respective locking elements, and a pin which can be rotated by a lock cylinder core for moving the locking elements into their locking position. The pin has an engagement element configured to cooperate with an entrainer formation on the lock cylinder core. The padlock also includes a blocking plate located between the pin and the lock cylinder core and which is fastened in the lock body. The blocking plate has an opening through which the entrainer formation projects into the plane of the engagement element. The opening is configured such that, on the one hand, rotational movement of the lock cylinder core is possible and, on the other hand, a marginal region of the opening forms an abutment engageable with the entrainer formation for restricting rotational movement of the lock cylinder core.