A body movement assistance apparatus comprising: a pulley configured to wind or unwind a wire which is connectable to a cover to be worn on a specific body part to limit a movement of the specific body part between a first position and a second position; a motor configured to rotate the pulley in forward and reverse directions such that the wire is wound around or unwound from the pulley ; and a stopper device configured to limit the winding or unwinding of the wire such that, when the wire is connected to the cover , the specific body part does not deviate from between the first position and the second position, characterised in that the stopper device includes: a pulley hook protruding from one side of the pulley to form a turning trajectory depending on the rotation of the pulley ; a disk having a disk track to which the pulley hook is movably coupled, the disk track having a predetermined arc length and corresponding to the turning trajectory of the pulley hook , wherein the disk has, on a planar surface thereof, a disk hook formed at a position corresponding to the pulley hook ; and a stopper having a stopper track to which the disk hook is movably coupled, the stopper track having a predetermined arc length along the turning trajectory of the pulley hook , wherein the disk is provided between the pulley and the stopper so as to be rotatable and configured to adjust a movement range of the specific body part between the first position and the second position. a pulley configured to wind or unwind a wire which is connectable to a cover to be worn on a specific body part to limit a movement of the specific body part between a first position and a second position; a motor configured to rotate the pulley in forward and reverse directions such that the wire is wound around or unwound from the pulley ; and a stopper device configured to limit the winding or unwinding of the wire such that, when the wire is connected to the cover , the specific body part does not deviate from between the first position and the second position, characterised in that the stopper device includes: a pulley hook protruding from one side of the pulley to form a turning trajectory depending on the rotation of the pulley ; a disk having a disk track to which the pulley hook is movably coupled, the disk track having a predetermined arc length and corresponding to the turning trajectory of the pulley hook , wherein the disk has, on a planar surface thereof, a disk hook formed at a position corresponding to the pulley hook ; and a stopper having a stopper track to which the disk hook is movably coupled, the stopper track having a predetermined arc length along the turning trajectory of the pulley hook , wherein the disk is provided between the pulley and the stopper so as to be rotatable and configured to adjust a movement range of the specific body part between the first position and the second position. a pulley hook protruding from one side of the pulley to form a turning trajectory depending on the rotation of the pulley ; a disk having a disk track to which the pulley hook is movably coupled, the disk track having a predetermined arc length and corresponding to the turning trajectory of the pulley hook , wherein the disk has, on a planar surface thereof, a disk hook formed at a position corresponding to the pulley hook ; and a stopper having a stopper track to which the disk hook is movably coupled, the stopper track having a predetermined arc length along the turning trajectory of the pulley hook , wherein the disk is provided between the pulley and the stopper so as to be rotatable and configured to adjust a movement range of the specific body part between the first position and the second position. <EOS>