PURPOSE: To provide a photographic processing agent packaging method light in weight, compact in size and low in tranporting cost while maintaining good photographic processability by providing an opening where the outlets for colorants are integrally sealed to the package having plural insides.

CONSTITUTION: An aluminum foil with the surface coated with a PE resin is used as the material, a boundary between A and B is heat-sealed to form two insides, then the constituent of the processing soln. is added respectively to A and B, and the upper part is heat-sealed. Meanwhile, A and B are simultaneously opened by breaking the package leterally from a breaking part C. Any packaging material with the inside material not reacting catalytically with the constituent can be used, however the material resistant to moisture is preferably used. Consequently, since the chemicals reacting with each other are separately housed, the preservability is improved. Besides, not only the solid component but also the liq. component or their mixture are separately introduced into the plural insides, and a compact package easy to handle is enabled.