PRESSURE REGULATING VALVE

A pressure regulating valve is provided that can inhibit lowering of sealing performance due to force from an outside without adding elements. A pressure regulating valve 1 includes a base member 2 and a valve body member 3. The base member 2 has a first sealing portion 11 which surrounds an opening portion 120 from an outer periphery side and is annular, a second sealing portion 12 with which the valve body member 3 is provided to be contactable and is annular, and a support portion 21 which supports the valve body member 3. The support portion 21 supports a valve body member 2 such that the valve body member 2 is movable so as to be contactable with the second sealing portion 12. The valve body member 3 has a contact portion 31 and a side wall part 32 which extends from the contact portion 31. The contact portion 31 is contactable with the second sealing portion 12. The side wall part 32 is annular so as to cover the second sealing portion 12 from the outer periphery side and has an inclined portion 33. The inclined portion 33 expands to the outer periphery side as progresses downward.