A release agent composition for skin adhesives in provided, comprising 85-99.8 wt% of a methylsiloxane solvent with a boiling point of at least 95°C and below 170°C, 0.1-5 wt% of an oil-compatible and pressure-sensitive adhesive-dissolving oil with a boiling point of at least 1700C, and 0.1-10 wt% of a nonionic surfactant.