Actuator

An actuator configured to adjust a direction of radiation of light emitted from a light source of a lamp unit disposed in a lamp case including a lamp housing having an opening at least at one side and a cover that blocks the opening of the lamp housing, comprising:

• a case body having an internal space serving as an installation space;
• a drive motor disposed in the installation space;
• and
• a driven body having a driving force transmitting portion to which driving force generated by the drive motor is transmitted, and an output shaft that is coupled to the lamp unit and that outputs the driving force transmitted to the driving force transmitting portion to the lamp unit, the driven body being supported by the case body so as to be movable in a front-rear direction of the lamp unit,
• the driving force transmitting portion and the output shaft being integral with each other,
• wherein the case body has a guide portion that guides the driven body in the front-rear direction, the guide portion being integral with the case body.