The present invention enlarges the working pressure flowing into the working chamber and improves the response ability of the valve controlling the fluid using a compact solenoid portion. In the control valve according to the present invention, the first effective pressure receiving area of the first pressure sensing spring apparatus, the first pressure receiving area of the first poppet valve and the second pressure receiving area of the second poppet valve are made substantially equal while the second effective pressure receiving area of the second pressure receiving spring apparatus are made larger than the first effective pressure receiving area of the first pressure receiving spring apparatus; and the valve seat body co-operates with the first valve body to close and open the first poppet valve and the second poppet valve in accordance with a pressure of the working fluid flowing into the communication chamber from the third poppet valve when the third poppet valve is opened and the fourth poppet valve is closed by moving the solenoid rod forward.