PURPOSE: To ensure the replenishment of solid processing agents to an automatic developing machine by making an operation to exchange a solid processing agent housing container easier and more efficient.

CONSTITUTION: This solid processing agent replenishing device 30 for silver halide photographic sensitive materials replenishes the solid processing agents J to at least one of processing liquid sections 1 of the automatic developing machine for processing the silver halide photographic sensitive materials. The solid processing agent replenishing device for the silver halide photographic sensitive materials described above has plural loading devices 34 which discretely attach and detach the plural solid processing agent housing containers 33 for housing the solid processing agents J, plural supplying devices 35 for successively supplying the solid processing agents J in the plural solid processing agent housing containers 33 to the processing liquid sections 2 and plural driving devices 36 for discretely driving these supplying devices 35.