A camera module includes a housing having a first ball support surface disposed on an inner surface thereof, a driving body movably disposed in the housing and having a second ball support surface disposed on an outer surface thereof, and a plurality of ball bearings disposed between the first ball support surface of the housing and the second ball support surface of the driving body. A distance between the first ball support surface and the second ball support surface along a direction perpendicular to an optical axis direction is different at respective first end portions of the first ball support surface and the second ball support surface in the optical axis direction than at respective second end portions of the first ball support surface and the second ball support surface in the optical axis direction.