The invention relates to an extractable shoulder support (1) for a hand gun with a movable shaft end (2) comprising a lockable locking shaft (5) which extends in the direction of displacement. A locking element (6) and a handle (7) are disposed in a torsion-proof manner at the opposite ends of the locking shaft (5) in such a way that the locking element (6) can be swiveled by means of the handle (7). The locking element (6) engages on a catching rail (12) that is stationary in relation to the gun housing while locking the shaft end (2) in at least one position in the locked position. The catching rail (12) and the locking shaft (6) are located parallel to each other at a distance from one another.