An embodiment of the present invention discloses a camera actuator comprising: a housing; a mover on which an optical member sits and which is disposed inside the housing; a ball part including a first ball and a second ball and disposed between the housing and the mover; and a driving unit that is disposed inside the housing to drive the mover, wherein the mover includes a first protrusion extending toward the housing and including a recess. The recess includes: a side surface on which the ball part sits and on which at least a portion of the recess is spaced apart from the ball part; and a bottom surface in contact with the side surface.