A lens barrel includes a fixing frame provided with cam grooves formed in an inner circumferential surface of the fixing frame, and a drive frame provided with cam followers formed on an outer circumferential surface of the drive frame and a plurality of engaging teeth to the outer circumferential surface of the drive frame, located on substantially the same circumference as the cam followers. With the drive frame incorporated in the fixing frame, the cam followers are fitted in the cam grooves, drive force is transmitted via the engaging teeth, and the drive frame can move relative to the fixing frame in the optical axis direction of a lens as the cam followers move along the cam grooves. In this lens barrel, cam followers are less likely to come out of the cam grooves.