A hydraulic circuit changeable between a state of executing a regeneration action and a state of stopping the regeneration action. The hydraulic circuit includes hydraulic pumps; a plurality of hydraulic actuators; a plurality of control valves provided for respective hydraulic actuators; a regeneration line through which return oil returned from a specific hydraulic actuator of the hydraulic actuators to a tank is supplied to a regeneration target; a regeneration valve; a meter-out valve; and a flow-path selection device selecting a flow path for the return oil from a first flow path supplying the return oil to the regeneration line to cause the regeneration action and a second flow path supplying the return oil to the control valve for the specific hydraulic actuator to stop the regeneration action.