Abstract: The invention relates to a radial-piston hydraulic motor (10), having at least one cylinder groups (1) placed in a stationary position, which. cylinder groups contain piston mechanisms moving radially back and forth. A cam ring (12) is connected with a box frame (11) and the box frame with a distributor valve (13), which controls the pressurized fluid flow at the correct time into the cylinder spaces of the pistons that are at the power stage. The sense of rotation of the motor can be reversed by reversing the direction of flow of the fluid through the distributor valve (13). The fluid is passed to the distributor valve (13) through the sets of ducts in the shaft (14) which is placed in a stationary position together with the cylinder frame(s) (15) of at least one cylinder groups (1). The distributor (13) has a duct (31) which communicates with the power pressure and which is opened on the side face (13a) of the distributor (13).