Abstract: An applicator apparatus (1) of a shoe cover (2) provided with an insertion opening (3) of a footwear is described, comprising:--a supporting frame (5);--at least one supporting framework (6) of a shoe cover (2) supported by the frame (5), wherein the supporting framework (6) is substantially ring-shaped so as to hold in a widened condition the insertion opening (3) of a shoe cover (2) peripherally applied on the framework (6); and wherein the supporting framework (6) is movably supported in the frame (5) between an upper application position of the shoe cover (2) on the framework (6) and a lower release position of the shoe cover (2) peipherically applied thereon.