A lens barrel includes a stationary barrel, a rotary barrel, and a movable barrel. The movable barrel includes a cam follower fitted to a straight groove in the stationary barrel and a cam groove in the rotary barrel. The surface of the cam follower to be in contact with the inner wall surface of the cam groove and the surface of the cam follower to be in contact with the inner wall surface of the straight groove have an arc shape convex toward the outside, and the cam follower is in point contact with the inner wall surfaces of the cam groove and the straight groove. The cam follower includes a first slit that is cut in from the distal end toward a proximal end thereof in parallel to an axis and a second slitcut in from an outer peripheral portion of the cam follower toward an inner peripheral portion.