To obtain a simple replenishing method with especially low cost by adding two kinds of concentrated soln. states of chemicals to replenish a treating bath.

Chemicals to replenish a treating bath are added in two kinds of concentrated soln. states into a treating bath. This method can be is used for both of the treatment for a color negative film and treatment for color photographic paper, however, the replenishing amt. and concn. differ for each treatment. Namely, in a developing process of a color photographic paper, two kinds of concentrated solns. one of which contains a color developing agent and an alkali or alkali-donating compd. are added to a developing bath by each 1 to 15ml/m2 of the color photographic paper to be developed. In a developing process of a color film, two kinds of concentrated solns. one of which contains a color developer and an alkali or alkali-donating compd. are added to a developing bath by each 3 to 300ml/m2 of the film to be developed.