A quick action coupling including a coupling body and a coupling nipple connectable with either of a pair of hoses or the like, the coupling body comprising a coupling sleeve in which the coupling nipple is introducible to a sealing position. In the wall of the coupling sleeve there are formed radially extending, through openings in which locking balls are radially movable. At the outer surface of the coupling sleeve there is provided a locking sleeve which is axially movable to lock and release the locking balls. The through openings in which the locking balls are positioned are slot-shaped to allow that the locking balls are displaced away from the position in which they are locked by the locking sleeve without requiring manipulation of the locking sleeve.