A warm-cool beauty treatment device, comprising: a Peltier element of a plate shape having a first surface configured to generate heat, and a second surface configured to absorb heat； a heat sink including—；a first section touching the first surface, and a second section connecting the first section thermally； a first plate connected to the first surface thermally via the heat sink； a second plate connected to the second surface thermally； a blower configured to produce air flow to release the heat of the second section； and a power supply configured to supply electric power to the Peltier element and the blower.
