The purpose of the present invention is to provide a pharmaceutical composition or a cosmetic composition for treating, preventing, or alleviating acne. To this end, provided is a pharmaceutical composition or a cosmetic composition including chlorin e6 which has excellent antibiotic activity against Propionibacterium acne as an active ingredient. According to the present invention, chlorin e6 is a photogem activated by the sunlight, a light bulb, etc. Accordingly, if the skin is coated with chlorin e6 and irradiated by natural light, the present invention shows effects of treating, preventing, or alleviating acne by destroying Propionibacterium acne and sebaceous gland.본 발명은 여드름균에 대한 항균활성이 우수한 클로린 e6이 활성성분으로 포함된 의약 조성물 또는 화장품 조성물에 관한 것이다.
