To provide a development processor where, even in the case the operations to be required are unclear owing to the deficiency of information, troubles caused by the defect of maintenance do not occur by allowing a man in charge of maintenance to rapidly and securely perform suitable operations.

In the development processor for a silver halide photographic sensitive material, the information on the change in the physical quantity stored in a storage means and the change in the physical quantity actually detected by a detection means are compared, further, the information on the history of maintenance operations stored in the storage means is collated, and the operations which should be performed by an operator are displayed on a display means.