PURPOSE: To provide a small-sized, light-weight, and economical both ends output type variable displacement hydraulic motor which is opened and closed by a microcomputer in place of a distributing valve and of which supply and discharge of hydraulic fluid from each cylinder is made by a set timing.

CONSTITUTION: A hydraulic rotating motor is provided with multiple cylinders and pistons and also provided with a synchronously rotating distributing valve at one end of an output shaft as a crankshaft so as to supply and discharge hydraulic fluid from each cylinder. It is also provided with a solenoid valve 19 which is provided on each cylinder in place of the distributing valve and controlled by a microcomputer for opening and closing and both output ends for crankshafts 1a and 1b which pass through the front and rear ends of a motor casing 6. Then it is formed in a star arrangement by arranging multiple cylinders at equal intervals and radially around the crankshaft.