CAPACITY CONTROL VALVE

There is provided a capacity control valve capable of improving responsiveness. A capacity control valve V includes: a valve housing 10 provided with a suction port 11 through which a suction fluid of a suction pressure Ps passes and a control port 12 through which a control fluid of a control pressure Pc passes; a valve body 51 to be driven by a solenoid 80; a spring 85 that biases the valve body 51 in a direction opposite to a direction of driving by the solenoid 80; a CS valve 50 that includes a CS valve seat 10a and the valve body 51, and that moves the valve body 51 to open and close a communication between the control port 12 and the suction port 11, the capacity control valve V opening and closing the CS valve 50 to control the control pressure Pc, in which the control fluid of the control pressure Pc is suppliable to a back side of the valve body 51, and the capacity control valve V further includes flow passage control device 40 that uses a fluid pressure generated by opening and closing of the CS valve 50 and a pressure on the back side of the valve body 51 to decrease the pressure on the back side of the valve body 51.