A composite valve (1, 201, 301) comprising: a body (5, 205, 305) having a lead-in/out port through which a working fluid is led in or led out, a lead-in port through which the working fluid is led in, and a lead-out port through which the working fluid is led out; a main valve provided in a main passage that communicates between the lead-in port and the lead-in/out port; a sub-valve provided in a sub-passage that communicates between the lead-in/out port and the lead-out port; a main valve element (30, 230, 330) configured to open and close the main valve by touching and leaving a main valve seat provided in the main passage, the main valve element (30, 230, 330) being slidably supported by the body (5, 205, 305); a sub-valve element (36, 236) configured to open and close the sub-valve by touching and leaving a sub-valve seat provided in the sub-passage; and a solenoid (3, 203, 303) configured to generate a solenoidal force in accordance with an amount of current supplied; characterised by an actuating rod (38, 238) configured to be capable of directly or indirectly transmitting the solenoidal force to the main valve element (30, 230, 330) and the sub-valve element (36, 236), the actuating rod (38, 238) being coupled to the solenoid (3, 203, 303); a biasing member configured to bias the main valve element (30, 230, 330) in a closing direction of the main valve; and a pressing mechanism configured to increase a pressing load, by which to press the main valve element (30, 230, 330) in the closing direction of the main valve, in a manner such that the actuating rod (38, 238) is displaced relative to the main valve element (30, 230, 330). a body (5, 205, 305) having a lead-in/out port through which a working fluid is led in or led out, a lead-in port through which the working fluid is led in, and a lead-out port through which the working fluid is led out; a main valve provided in a main passage that communicates between the lead-in port and the lead-in/out port; a sub-valve provided in a sub-passage that communicates between the lead-in/out port and the lead-out port; a main valve element (30, 230, 330) configured to open and close the main valve by touching and leaving a main valve seat provided in the main passage, the main valve element (30, 230, 330) being slidably supported by the body (5, 205, 305); a sub-valve element (36, 236) configured to open and close the sub-valve by touching and leaving a sub-valve seat provided in the sub-passage; and a solenoid (3, 203, 303) configured to generate a solenoidal force in accordance with an amount of current supplied; characterised by an actuating rod (38, 238) configured to be capable of directly or indirectly transmitting the solenoidal force to the main valve element (30, 230, 330) and the sub-valve element (36, 236), the actuating rod (38, 238) being coupled to the solenoid (3, 203, 303); a biasing member configured to bias the main valve element (30, 230, 330) in a closing direction of the main valve; and a pressing mechanism configured to increase a pressing load, by which to press the main valve element (30, 230, 330) in the closing direction of the main valve, in a manner such that the actuating rod (38, 238) is displaced relative to the main valve element (30, 230, 330).