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.