Capacity control valve

A capacity control valve comprising:

• a valve housing provided with a discharge port through which a discharge fluid of discharge pressure passes, a suction port through which a suction fluid of suction pressure passes, and a control port through which a control fluid of control pressure passes;
• and a valve element configured to be brought into contact with and separated from a valve seat by a driving force of a solenoid to open and close a communication between the control port and the discharge port or a communication between the control port and the suction port, wherein a sliding region is formed by an inner peripheral surface of the valve housing and an outer peripheral surface of the valve element, a groove extending in a circumferential direction is formed in at least one of the inner peripheral surface of the valve housing and the outer peripheral surface of the valve element, the sliding region has a structure in which a swirling current is generated in the groove by a fluid flowing from a high-pressure side to a low-pressure side in a clearance between the inner peripheral surface of the valve housing and the outer peripheral surface of the valve element, the radial length of the clearance is within a range from 5 μm to 19 μm, and the groove includes at least two threads of spiral grooves.