A hydraulic pressure drive device (1) is provided with direction control valves (26), electromagnetic proportion control valves (42), operating valves (37), and a control device (50). The direction control valves (26), which are provided to each of three actuators (7, 9, 10), supply oil to the actuators (7, 9, 10) at a flow rate corresponding to pilot pressure. The electromagnetic proportion control valves (42), which are provided corresponding to each of the direction control valves (26), provide the direction control valves (26) with output pressure of a pressure corresponding to a received command signal as the pilot pressure. The operating valves (36), which are provided corresponding to each of the electromagnetic proportion control valves (42), output a command pressure corresponding to the manipulated variables of operating levers (37). The control device (50) calculates a command signal corresponding to the command pressure from the operating valves (36) on the basis of output characteristics that are switched according to an actuation condition, and outputs the command signal to the electromagnetic proportion control valves (42) that correspond to the operating valves (36).