A capacity control valve for controlling a flow rate or pressure of a variable capacity compressor in accordance with a valve opening degree of a valve portion, the capacity control valve comprising: a valve main body having a first communication passage through which a fluid of first pressure (Ps; Pc) passes, a second communication passage arranged adjacent to the first communication passage , the second communication passage through which a fluid of second pressure (Pd) passes, a third communication passage through which a fluid of third pressure (Pc; Ps) passes, and a main valve seat arranged in a valve hole which provides communication between the second communication passage and the third communication passage ; a solenoid that drives a rod having an auxiliary valve seat ; a valve element having an intermediate communication passage providing communication between the first communication passage and the third communication passage , a main valve portion to be separated from and connected to the main valve seat so as to open and close the valve hole , and an auxiliary valve portion to be separated from and connected to the auxiliary valve seat so as to open and close the intermediate communication passage ; and a first biasing member that biases in the valve closing direction of the main valve portion , wherein the first biasing member is arranged between the rod and the valve element , characterized in that a spring constant of the first biasing member has a characteristic that the spring constant is increased in an opened state of the main valve portion and decreased in a closed state, wherein the first biasing member is a circular-conical disc plate having a hole larger than an outer diameter of the rod in a center portion, and when the rod moves relative to the valve element in a closed state of the main valve portion , the first biasing member deforms, and the auxiliary valve seat is separated from the auxiliary valve portion . a valve main body having a first communication passage through which a fluid of first pressure (Ps; Pc) passes, a second communication passage arranged adjacent to the first communication passage , the second communication passage through which a fluid of second pressure (Pd) passes, a third communication passage through which a fluid of third pressure (Pc; Ps) passes, and a main valve seat arranged in a valve hole which provides communication between the second communication passage and the third communication passage ; a solenoid that drives a rod having an auxiliary valve seat ; a valve element having an intermediate communication passage providing communication between the first communication passage and the third communication passage , a main valve portion to be separated from and connected to the main valve seat so as to open and close the valve hole , and an auxiliary valve portion to be separated from and connected to the auxiliary valve seat so as to open and close the intermediate communication passage ; and a first biasing member that biases in the valve closing direction of the main valve portion , wherein the first biasing member is arranged between the rod and the valve element , characterized in that a spring constant of the first biasing member has a characteristic that the spring constant is increased in an opened state of the main valve portion and decreased in a closed state, wherein the first biasing member is a circular-conical disc plate having a hole larger than an outer diameter of the rod in a center portion, and when the rod moves relative to the valve element in a closed state of the main valve portion , the first biasing member deforms, and the auxiliary valve seat is separated from the auxiliary valve portion . <EOS>