A variable-capacity compressor control valve comprising: a valve body including a valve chamber with a valve orifice , a Ps inlet/outlet port communicating with a suction chamber of a compressor , a Pd introduction port arranged upstream of the valve orifice and communicating with a discharge chamber of the compressor , and a Pc inlet/outlet port arranged downstream of the valve orifice and communicating with a crank chamber of the compressor ; a main valve element adapted to open or close the valve orifice ; an electromagnetic actuator including a plunger and an attractor , the electromagnetic actuator being adapted to move the main valve element in a direction to open or close the valve orifice ; a pressure-sensitive chamber adapted to receive a suction pressure Ps from the compressor via the Ps inlet/outlet port ; and a pressure-sensitive reaction member adapted to urge the main valve element in the direction to open or close the valve orifice in accordance with a pressure in the pressure-sensitive chamber ; wherein the main valve element includes an in-valve release passage for releasing a pressure Pc in the crank chamber to the suction chamber of the compressor via the Ps inlet/outlet port , and a sub valve element adapted to open or close the in-valve release passage is provided; characterized in that the plunger has a cylindrical shape, and the sub valve element is inserted in the plunger , and one or more magnetic bodies made of the same magnetic material as or a different magnetic material from that of the plunger are fixed to at least a part of an inner periphery of an end portion of the plunger that is opposite the attractor in order to increase an attraction force of the electromagnetic actuator. a valve body including a valve chamber with a valve orifice , a Ps inlet/outlet port communicating with a suction chamber of a compressor , a Pd introduction port arranged upstream of the valve orifice and communicating with a discharge chamber of the compressor , and a Pc inlet/outlet port arranged downstream of the valve orifice and communicating with a crank chamber of the compressor ; a main valve element adapted to open or close the valve orifice ; an electromagnetic actuator including a plunger and an attractor , the electromagnetic actuator being adapted to move the main valve element in a direction to open or close the valve orifice ; a pressure-sensitive chamber adapted to receive a suction pressure Ps from the compressor via the Ps inlet/outlet port ; and a pressure-sensitive reaction member adapted to urge the main valve element in the direction to open or close the valve orifice in accordance with a pressure in the pressure-sensitive chamber ; wherein the main valve element includes an in-valve release passage for releasing a pressure Pc in the crank chamber to the suction chamber of the compressor via the Ps inlet/outlet port , and a sub valve element adapted to open or close the in-valve release passage is provided; characterized in that the plunger has a cylindrical shape, and the sub valve element is inserted in the plunger , and one or more magnetic bodies made of the same magnetic material as or a different magnetic material from that of the plunger are fixed to at least a part of an inner periphery of an end portion of the plunger that is opposite the attractor in order to increase an attraction force of the electromagnetic actuator. <EOS>