The present application discloses a quick-action coupling (100) for a rotary surgical tool having a rotary shaft (20), in the distal end surface of which there is formed a tool receptacle (24) which is adapted to receive a rotary surgical tool for conjoint rotation. The rotary shaft (20) has, in the region of its distal end (21), at least one radial protrusion (22) and at least one radial aperture, wherein a locking body is arranged in the at least one aperture, said locking body being movable in the radial direction with respect to the rotary shaft (20). A sleeve (10), the proximal end of which is pushable over the distal end (21) of the rotary shaft (20), is additionally provided in the quick-action coupling. The inner surface of the sleeve (10) contains a region in which the inside diameter of the distal section (102) is enlarged compared with the inside diameter of the proximal section (101), and the sleeve (10) has at least one slot (11, 11′, 12, 12′, 13, 13′, 13″, 14, 15, 16, 17) which has a first slot section (11, 11′) and at least one further slot section (12, 12′, 13, 13′, 13″, 14, 15, 16, 17), wherein the first slot section (11, 11′) extends from the proximal end of the sleeve (10) and the further slot section (12, 12′, 13, 13′, 13″, 14, 15, 16, 17) is connected to the first slot section (11, 11′). An elastic element (30) urges the sleeve (10) in the distal direction relative to the rotary shaft (20).