The present invention relates to a cosmetic composition for keloid scar improvement. The cosmetic composition for keloid scar improvement according to the present invention contains a sponge cucumber extract and a pineapple extract as active ingredients. Through the above constitution, the cosmetic composition is prepared by using natural extracts, so that the present invention can have an excellent effect of improving keloid scars, cause fewer side effects, have antibacterial and anti-inflammatory actions of saponin and flavonoid components of sponge cucumber, relieve pain through the alleviation of skin itchiness and skin redness, and alleviate skin dryness through a moisturizing effect.