To obtain a cosmetic for scalp and hair of the head having excellent preventing effects on alopecia, trichogenous effects and preventing effects on pruritus of the scalp and dandruff and further excellent in safety.

This cosmetic for the scalp and hair of the head comprises an antiseborrheic ingredient and a dimethylamine oxide represented by the following formula. The antiseborrheic ingredient is especially pyridoxines, sulfur and/or hydroxyflutamide.