To provide a hydraulic circuit that can supply operating fluid to a pilot port of a directional switching valve while a controller does not provide a command signal.

A selection switching valve 74 is provided between individual remote control valves 59, 79, 89 and pilot ports 55a, 75a, 85a of direction switching valves 55, 75, 85 composing hydraulic circuits to be switchable in a lamp to a state where the remote control valves 59, 79, 98 are connected to the pilot ports 55a, 75a, 85a through electromagnetic valves 62, 82, 92, or to a state where the remote control valves 59, 79, 89 are connected to the pilot ports 55a, 75a, 85a without the electromagnetic valves 62, 82, 92. Operating the selection switching valve 74 directly provides the fluid pressure of the operating fluid from the remote control valves 59, 79, 89 to the pilot ports 55a, 75a, 85a of the direction switching valves 55, 75, 85.