PURPOSE: To provide a hydraulic driving device for construction machine capable of control desirably a detecting means for detecting the driving conditions of a drive mechanism and a detecting means for detecting pressure oil conditions including the pressure of hydraulic oil flowing through circuits.

CONSTITUTION: A hydraulic driving device for construction machine is provided with an engine, a main hydraulic pump 2 driven by the engine 1, actuators driven by hydraulic oil which is delivered from the main hydraulic pump 2, working bodies operated by the driving of the actuators, a directional control valve 10 to control the flow of pressure oil supplied to the actuators, pilot valves 19 to 23 to operatingly change over the directional control valve 10, and pressure switches to detect the pressure of pressure oil flowing through circuits. Then the pressure switches comprise multiple pressure switches W1 and W2, V1 and V2, X1 and X2, Y1 and Y2, and Z1 and Z2, each located roughly at the same detecting places, respectively.