To provide a processing liquid which prevents a fog generated in one bath process in which a silver halide photosensitive material is developed and fixed at the same time, without effect on other photographic properties.

In the one bath process for developing and fixing the silver halide light-sensitive material immersed in one single bath at the same time, the method uses a one bath developing and fixing liquid which includes at least one kind of compounds expressed by chemical formulas 3 or 4, and processes the material.