Fluid pressure circuit

A fluid pressure circuit, comprising:

• a tank that is configured to store a fluid;
• a fluid supply source configured to supply the fluid in the tank;
• a cylinder device extended and retracted by the fluid from the fluid supply source;
• a switching valve disposed between the fluid supply source and the cylinder device configured to switch between flow passages of the fluid;
• a flow diversion valve located closer to a side of the cylinder device than the switching valve and configured to divert at least some of a return fluid returning from the cylinder device to the tank;
• a regenerative drive source driven in a regenerative mode by the diverted return fluid;
• an operating device configured to output a switching command corresponding to an operation to the switching valve;
• and
• an actuating device configured to output a switching command to the flow diversion valve in response to operation of the operating device,
• wherein a return flow passage through which the return fluid flows from the cylinder device to the regenerative drive source is provided with a control valve configured to open the flow passage in response to the operation of the operating device.