A camera module includes a housing having an internal space, and a first lens module and a second lens module disposed in the internal space and each configured to be movable in an optical axis direction, wherein a first shaft and a first ball member are disposed between the first lens module and the housing, wherein a second shaft and a second ball member are disposed between the second lens module and the housing, and wherein, when moving in the optical axis direction, rolling friction occurs on one of both sides of each lens module, and sliding friction occurs on the other of both sides.