This invention provides a hydraulic circuit device which improves the statically determinate properties of each actuator when each operation valve is operated abruptly, increases the discharge flow rate of a variable pump to improve responsiveness when each operation valve is set to a neutral position and compensates for the pressure when a pressure oil is supplied to each actuator. The hydraulic circuit device includes a bleed-off circuit (11) which connects the discarge path (1a) of the variable pump (1) for discharging the pressure oil to a tank, a bleed-off valve (12) which is disposed in the bleed-off circuit, and is switched to a communication position (I) when each operation valve (2) is in the neutral position and to a cut-off position (II) when each operation valve is in a first or second pressure oil supply position, and a throttle (13) disposed in the bleed-off circuit.
