Dyeing and discoloration effects on the fabrics of cotton, silk and rayon with unriped persimmon juice were investigated. Color of dyed fabrics treated with persimmon juice only, added 3% tartaric acid or 3% aluminium sulfate was not different each other. Dyeing assistants such as tartaric acid or aluminium sulfate were effective on the prevention from discoloration of dyed fabrics and ultraviolet rays. Discoloration were supposed to derive from tannin in unriped persimmon, ultraviolet rays, oxygen, enzyme and so on, ultraviolet rays at wavelength of 253.7nm was the most active the chromatophores and discoloration. The fabrics could be dyed, when unriped persimmon juice was store at low temperature or freezing.