To provide a silver halide photosensitive material processor equipped with a processing liquid supply device which can prevent a processing liquid coating part from caking when the process is not in operation.

This silver halide photosensitive material processor is equipped with processing liquid supply devices each having a processing liquid coating part which performs a developing process by coating the emulsion surface of a silver halide photosensitive material with the processing liquid by jetting or scattering the processing liquid over the emulsion surface of the relatively moving silver halide photosensitive material or bringing a processing liquid impregnated material. Then a sealing means holds the processing liquid coating part of a processing liquid supply device which supplies the processing liquid containing at least a developing base s among those processing liquid supply devices in a sealed space when not in operation and exposes only in operation.