A capacity control valve (V) comprising: a valve housing provided with a suction port through which a suction fluid of suction pressure (Ps) passes, and a control port through which a control fluid of control pressure (Pc) passes; a pressure drive portion including a bellows core that is housed in a pressure drive chamber formed inside the valve housing so as to communicate the suction port , that is formed to be extendable and contractible in an axial direction, and that receives a force in a contracting direction from the suction fluid, the contracting direction being a direction in which the pressure drive portion is contractable; and a main valve formed by a valve element that receives a force in a valve opening direction of the main valve from the pressure drive portion , and a valve seat with and from which the valve element is brought into contact and separated, wherein the valve element is arranged to receive a force in a valve closing direction of the main valve from the control fluid, the pressure drive portion further includes a coil spring that is housed inside the bellows core , and that is configured to bias the bellows core at all times in a direction in which the bellows core is extended in the axial direction, the valve housing is formed to pass through in the axial direction, and a filter covers and fits onto a leading end portion of the valve housing , characterized in that an opening portion formed to pass through an end surface of the filter forms the control port , a tubular cap is fitted into the leading end portion of the valve housing , in an inner peripheral portion of this cap , a spring that retains and biases the valve element in the valve closing direction is provided, the control port is open at a position out of the axis of the main valve , and a tapered leading end portion of the cap faces on the inside of the control port . a valve housing provided with a suction port through which a suction fluid of suction pressure (Ps) passes, and a control port through which a control fluid of control pressure (Pc) passes; a pressure drive portion including a bellows core that is housed in a pressure drive chamber formed inside the valve housing so as to communicate the suction port , that is formed to be extendable and contractible in an axial direction, and that receives a force in a contracting direction from the suction fluid, the contracting direction being a direction in which the pressure drive portion is contractable; and a main valve formed by a valve element that receives a force in a valve opening direction of the main valve from the pressure drive portion , and a valve seat with and from which the valve element is brought into contact and separated, wherein the valve element is arranged to receive a force in a valve closing direction of the main valve from the control fluid, the pressure drive portion further includes a coil spring that is housed inside the bellows core , and that is configured to bias the bellows core at all times in a direction in which the bellows core is extended in the axial direction, the valve housing is formed to pass through in the axial direction, and a filter covers and fits onto a leading end portion of the valve housing , characterized in that an opening portion formed to pass through an end surface of the filter forms the control port , a tubular cap is fitted into the leading end portion of the valve housing , in an inner peripheral portion of this cap , a spring that retains and biases the valve element in the valve closing direction is provided, the control port is open at a position out of the axis of the main valve , and a tapered leading end portion of the cap faces on the inside of the control port . <EOS>