A sanitary washing device, comprising: a private part wash nozzle having a water discharge port dispensing washing water toward a private part of a user; a drive device causing the private part wash nozzle to advance and retract; a casing including a nozzle container configured to store an entirety of the private part wash nozzle in a state in which the private part wash nozzle is retracted; a nozzle lid provided to be openable and closable with respect to an opening provided at a front end of the nozzle container, the nozzle lid being in an open state in which the opening is open when the private part wash nozzle is advanced, the nozzle lid being in a closed state in which the opening is closed when the entirety of the private part wash nozzle is stored in the nozzle container; and an illuminator irradiating sterilizing light into an interior of the nozzle container, the sterilizing light having a sterilizing effect, at least one of the nozzle lid or a vicinity of the nozzle lid being luminous in a state of being visible to the user when the nozzle lid is in the closed state and the sterilizing light from the illuminator is irradiated into the interior of the nozzle container, wherein the illuminator is provided in an interior of the casing and irradiates the sterilizing light including an ultraviolet light component, characterized in that either the nozzle lid includes a wavelength conversion material configured to convert the ultraviolet light component into a visible light component, and the illuminator causes the nozzle lid to be luminous by the ultraviolet light component being converted into the visible light component at the nozzle lid; or the illuminator irradiates the sterilizing light including the ultraviolet light component and a visible light component so that the sterilizing light leaks outside from a gap between the opening and the nozzle lid. a private part wash nozzle having a water discharge port dispensing washing water toward a private part of a user; a drive device causing the private part wash nozzle to advance and retract; a casing including a nozzle container configured to store an entirety of the private part wash nozzle in a state in which the private part wash nozzle is retracted; a nozzle lid provided to be openable and closable with respect to an opening provided at a front end of the nozzle container, the nozzle lid being in an open state in which the opening is open when the private part wash nozzle is advanced, the nozzle lid being in a closed state in which the opening is closed when the entirety of the private part wash nozzle is stored in the nozzle container; and an illuminator irradiating sterilizing light into an interior of the nozzle container, the sterilizing light having a sterilizing effect, at least one of the nozzle lid or a vicinity of the nozzle lid being luminous in a state of being visible to the user when the nozzle lid is in the closed state and the sterilizing light from the illuminator is irradiated into the interior of the nozzle container, wherein the illuminator is provided in an interior of the casing and irradiates the sterilizing light including an ultraviolet light component, characterized in that either the nozzle lid includes a wavelength conversion material configured to convert the ultraviolet light component into a visible light component, and the illuminator causes the nozzle lid to be luminous by the ultraviolet light component being converted into the visible light component at the nozzle lid; or the illuminator irradiates the sterilizing light including the ultraviolet light component and a visible light component so that the sterilizing light leaks outside from a gap between the opening and the nozzle lid.