A lens barrel comprises: a first focus ring used for either one of instruction types of focus operation of a relative position instruction type focus operation for moving a position of the focus lens for focus control and an absolute position instruction type focus operation for moving it in an absolute positional relation; a second focus ring used for the focus operation of the instruction type different from that of the first focus ring between the relative position and the absolute position instruction type focus operation; a support device which slidably supports the first focus ring; a connecting device which brings the first focus ring and the second focus ring from an unconnected state into a connected state when the first focus ring is slid from a first position to a second position; and a cover member covering the outer circumference portion of the second focus ring.