To provide a means for improving the stability of a fragrant substance, unstable to light and having a keto acid ester in its structure.

This perfume stabilizing composition contains a fragrant substance having a keto acid ester in its structure, e.g. ethyl acetoacetate, ethyl pyruvate, isoamyl pyruvate or ethyl levulinate and an ultraviolet light absorber having ultraviolet light absorptivity at a long wavelength such as 4-tert-butyl-4'- methoxydibenzoylmethane.