<p>Provided is an exhaust pressure control valve for controlling the pressure of an exhaust gas to be discharged from an engine. The exhaust pressure control valve reduces the unusual noises which will arise when a main valve is switched from a closed state to an open state. The exhaust pressure control valve (10) comprises a housing (11) having a main passage (12) and a bypass passage (28), a main valve (30) for switching a closed state to close the main passage (12) and an open state to open the main passage (12), and a bypass valve (26) for opening/closing the bypass passage (28). An inlet port (16) is formed in the inner wall face of the main passage (12) on the upstream side of the main valve. An outlet port (46) is formed in the inner wall face of the main passage (12) on the downstream side of the main valve. The upstream end of the bypass passage (28) is connected to the inlet port (16), and the downstream end of the bypass passage (28) is connected to the outlet port (46). The position of the outlet port (46) deviates in the circumferential direction from the position of that point on the circumferential edge of a valve member, at which the distance from the axis of the rotating shaft of the main valve to the circumferential edge of the valve member is the longest.</p>
