A high-frequency cosmetic treatment apparatus capable of preventing local heating of a skin is provided. The high-frequency cosmetic treatment apparatus includes: a portable casing; side-by-side electrodes disposed at a tip portion of the casing with a predetermined interval provided therebetween, and having treatment surfaces to be contacted with a skin of a user; and a first power supply disposed in the casing, and to supply a high-frequency current to the pair of side-by-side electrodes.