A sanitizing system for a vehicle includes an ultraviolet light source mounted on the vehicle and configured to irradiate an irradiation target with an ultraviolet ray so as to sanitize the irradiation target and a control unit configured to control the ultraviolet light source to be turned on and off. The sanitizing system may further include an illumination light source configured to illuminate the irradiation target of the ultraviolet light source. The control unit may turn on the illumination light source when the ultraviolet light source is turned on. The control unit may be configured to carry out a first detection that an occupant outside the vehicle approaches the vehicle and turn on the ultraviolet light source in response to the first detection.