A capacity control valve comprising: a valve housing provided with a Ps port through which a suction fluid at a suction pressure (Ps) passes and a Pc port through which a control fluid at a control pressure (Pc) passes; a valve body (51, 151) that forms a main valve in cooperation with a valve seat, the valve body (51, 151) coming into contact with and separating from the valve seat to close and open a communication between the Pc port and the Ps port by a driving force of a solenoid; a pressure sensitive body that is disposed in a pressure sensitive chamber formed inside the valve housing and that communicates with the PS port; a movable core provided in the valve housing and configured to move in an axial direction; a fixed core fixed to the valve housing; a coil provided on an outer periphery of the fixed core; and a rod (51, 151) fixed to the movable core; wherein the suction fluid is supplied from the Ps port to the pressure sensitive chamber in which the pressure sensitive body is disposed, and an accommodation chamber in which a rear side portion of the valve body (51, 151) is accommodated is provided with a supply passage (14, 114) to which the suction fluid is supplied; wherein the rod (51, 151) is formed by one seamless member having a first end portion fixed to the movable core, an intermediate portion passing through the fixed core, a second end portion connected to the pressure sensitive body, and a step portion formed between the intermediate portion and the second end portion, the valve body (51, 151) being formed by the step portion of the rod (51, 151); wherein the valve housing is provided with a partition wall extending in an inward radial direction between the pressure sensitive chamber and the accommodation chamber, the supply passage (14, 114) being a communication hole formed in the partition wall so as to communicate with the pressure sensitive chamber and the accommodation chamber, and a flow passage cross-sectional area of the communication hole being the half or more of a flow passage cross-sectional area of a flow passage defined between the valve body (51, 151) and the valve seat upon the open state of the main valve; characterized in that the valve body (51, 151) has a sliding outer peripheral surface sliding with an inner peripheral surface of the valve housing and at least one groove formed in annular shape within the sliding outer peripheral surface to be recessed in inward direction from the sliding outer peripheral surface. a valve housing provided with a Ps port through which a suction fluid at a suction pressure (Ps) passes and a Pc port through which a control fluid at a control pressure (Pc) passes; a valve body (51, 151) that forms a main valve in cooperation with a valve seat, the valve body (51, 151) coming into contact with and separating from the valve seat to close and open a communication between the Pc port and the Ps port by a driving force of a solenoid; a pressure sensitive body that is disposed in a pressure sensitive chamber formed inside the valve housing and that communicates with the PS port; a movable core provided in the valve housing and configured to move in an axial direction; a fixed core fixed to the valve housing; a coil provided on an outer periphery of the fixed core; and a rod (51, 151) fixed to the movable core; wherein the suction fluid is supplied from the Ps port to the pressure sensitive chamber in which the pressure sensitive body is disposed, and an accommodation chamber in which a rear side portion of the valve body (51, 151) is accommodated is provided with a supply passage (14, 114) to which the suction fluid is supplied; wherein the rod (51, 151) is formed by one seamless member having a first end portion fixed to the movable core, an intermediate portion passing through the fixed core, a second end portion connected to the pressure sensitive body, and a step portion formed between the intermediate portion and the second end portion, the valve body (51, 151) being formed by the step portion of the rod (51, 151); wherein the valve housing is provided with a partition wall extending in an inward radial direction between the pressure sensitive chamber and the accommodation chamber, the supply passage (14, 114) being a communication hole formed in the partition wall so as to communicate with the pressure sensitive chamber and the accommodation chamber, and a flow passage cross-sectional area of the communication hole being the half or more of a flow passage cross-sectional area of a flow passage defined between the valve body (51, 151) and the valve seat upon the open state of the main valve; characterized in that the valve body (51, 151) has a sliding outer peripheral surface sliding with an inner peripheral surface of the valve housing and at least one groove formed in annular shape within the sliding outer peripheral surface to be recessed in inward direction from the sliding outer peripheral surface.