[Problem] To suppress a boundary layer separation phenomenon that occurs in a blade suction surface, while suppressing influence to airflow flowing along a blade pressure surface of a windmill blade. [Solution] A wind power generator in which lift-type windmill blades attached radially to a rotary shaft receive wind and rotate, to drive a generator to generate electric power, the wind power generator includes: protruding parts that protrude from a blade suction surface of the windmill blades in a region on a leading edge side of the windmill blades and on the rotary shaft side of the windmill blades in a longitudinal direction.
