Camera actuator and camera module including same

A camera actuator according to an embodiment includes: a base; the guide rail guide part is combined with the base; the first lens assembly is combined with the base and is fixed; and a second lens assembly and a third lens assembly disposed in the base and moving along the guide rail guide, in which the base includes a coupling protrusion and a base groove adjacent to the coupling protrusion, at least one of the guide rail guide portion and the first lens assembly includes a coupling hole corresponding to the coupling protrusion of the base. 根据实施例的相机致动器包括：基座；导轨引导部，导轨引导部与基座结合；第一透镜组件，第一透镜组件与基座结合并被固定；以及第二透镜组件和第三透镜组件，第二透镜组件和第三透镜组件设置在基座中并沿导轨引导部移动，其中，基座包括结合突起以及与结合突起相邻的基座凹槽，导轨引导部和第一透镜组件中的至少一个包括与基座的结合突起对应的结合孔。