The invention relates to a limb stump receiving sleeve (1) comprising an integrated locking device for locking a limb by sealing a distal region of the interior of the stump receiving sleeve in relation to the limb and the surrounding atmosphere, a functional element (3) of the device being integrated into the inner face of the receiving sleeve and a sealing element (5) that extends inwards being reversibly attachable to the functional element in a positive fit, preventing air from flowing in behind said element.