A control valve for a variable displacement compressor for varying a discharging capacity of the compressor for compressing refrigerant led into a suction chamber and discharging the compressed refrigerant from a discharge chamber, by regulating a flow rate of the refrigerant led into a control chamber from the discharge chamber, the control valve being applicable to a refrigeration cycle in which a refrigeration operation is performed in a supercritical range exceeding a critical temperature of the refrigerant, the control valve comprising: a body having a discharge chamber communication port communicating with the discharge chamber and a control chamber communication port communicating with the control chamber; a valve seat forming member having a valve hole, through which to communicate the discharge chamber communication port and the control chamber communication port, and a valve seat formed on an opening end of the valve hole, the valve seat forming member being integrally assembled with the body; a valve element for opening and closing a valve section by touching and leaving the valve seat; and an actuator, provided in the body, which supplies a valve-opening-direction or valve-closing-direction drive force to the valve element, wherein the valve seat forming member has a higher degree of hardness than the body, and the body has a valve chamber formed between the valve hole and the control chamber communication port, characterized in that the valve seat forming member is formed of a material whose Vickers hardness is 500 or above, the valve element is arranged in the valve chamber, and the valve seat forming member has a bleed hole that enables the refrigerant to be leaked from the discharge chamber communication port to the valve chamber while the valve section is being closed, the bleed hole being provided radially outward of the valve hole, and the bleed hole having a leak passage, whose diameter is smaller than that of the valve hole. a body having a discharge chamber communication port communicating with the discharge chamber and a control chamber communication port communicating with the control chamber; a valve seat forming member having a valve hole, through which to communicate the discharge chamber communication port and the control chamber communication port, and a valve seat formed on an opening end of the valve hole, the valve seat forming member being integrally assembled with the body; a valve element for opening and closing a valve section by touching and leaving the valve seat; and an actuator, provided in the body, which supplies a valve-opening-direction or valve-closing-direction drive force to the valve element, wherein the valve seat forming member has a higher degree of hardness than the body, and the body has a valve chamber formed between the valve hole and the control chamber communication port, characterized in that the valve seat forming member is formed of a material whose Vickers hardness is 500 or above, the valve element is arranged in the valve chamber, and the valve seat forming member has a bleed hole that enables the refrigerant to be leaked from the discharge chamber communication port to the valve chamber while the valve section is being closed, the bleed hole being provided radially outward of the valve hole, and the bleed hole having a leak passage, whose diameter is smaller than that of the valve hole.