A lens barrel includes a lens mount for holding a lens in a barrel, a guide shaft extending parallel to an optical axis of the lens within the barrel and connected to the lens mount for guiding the lens mount along the optical axis, and a support operable to support opposite ends of the guide shaft in its extending direction within the barrel, the support including a support unit operable to support at least one of the opposite ends of the guide shaft, the support unit including a hole provided in the barrel, and a bearing member attached from the exterior of the barrel into the hole and being removable therefrom, the bearing member being rotatable about a center axis of the hole, wherein the bearing member includes a shaft inserted into the hole and a bearing hole provided in the shaft, with one end of the guide shaft being inserted into the bearing hole and a center axis of the bearing hole being eccentric from a center axis of the shaft.