Abstract: Apparatus for launching movable discs of targets for trap shooting, of the type using a rotatable barrel (2) into which are loaded movable targets (1) that are superposed on each other in columns (3, 4) maintained by vertical tubes (5), disposed between an upper plate (6) recessed for the passage of the movable targets (1) and a lower plate (7) recessed for the passage of the movable targets (1) which fall on a base plate (10) fixed against rotation, which presents each movable target (1) to a launching ramp (42) in front of the launching arm (11). The loading of the movable targets (1) takes place frontally by spacing apart the vertical tubes (5). On the base plate (10), a roller cam acts to maintain in place the next-to-last movable target, this roller cam comprising adjusting mechanism to be adapted as a function of the diameter of the targets (1) used.