A sanitary washing device including: a nozzle discharging water toward a human body private part; a water guide part including a pipe line reaching from a water supply source to the nozzle, and guiding water supplied from the water supply source to the nozzle; a vacuum breaker provided on a path of the water guide part, and taking air into the pipe line when water does not flow in the water guide part; and an ultraviolet irradiation part provided between the vacuum breaker and the nozzle on the path of the water guide part, and including a flow channel flowing water and a light emitting part irradiating ultraviolet rays to the water flowing in the flow channel is provided.