A lens barrel configured to be attached to a camera main body, the lens barrel comprising: a stationary barrel having a large-diameter section and a recessed section which is recessed further toward an inner diameter side than the large-diameter section, the large-diameter section and the recessed section being along an optical axis direction; a substrate (70, 70A) attached so that at least a part thereof is disposed along an outer peripheral surface of the stationary barrel; movable barrels moving relative to the stationary barrel, the movable barrels being arranged on the outer periphery of the stationary barrel and on the large diameter section side than the substrate (70, 70A) in the optical axis direction; and a cable member (100, 100A) having flexibility which allows the cable member (100, 100A) to deform flexibly, the cable member (100, 100A) including a mounting section which is mounted on the substrate (70, 70A), including a passage section which passes between the substrate (70, 70A) and the stationary barrel, and including a length adjusting section which is provided between the mounting section and the passage section and on the recessed section side with respect to the substrate (70, 70A) in the optical axis direction, wherein at least a part of the cable member (100, 100A) located on the larger diameter section side than the passage section in the optical axis direction is located between the stationary barrel and a movable barrel, wherein the length adjusting section gives, to the passage section, biasing force in a direction in which the passage section is separated from the large-diameter section along the optical axis direction. a stationary barrel having a large-diameter section and a recessed section which is recessed further toward an inner diameter side than the large-diameter section, the large-diameter section and the recessed section being along an optical axis direction; a substrate (70, 70A) attached so that at least a part thereof is disposed along an outer peripheral surface of the stationary barrel; movable barrels moving relative to the stationary barrel, the movable barrels being arranged on the outer periphery of the stationary barrel and on the large diameter section side than the substrate (70, 70A) in the optical axis direction; and a cable member (100, 100A) having flexibility which allows the cable member (100, 100A) to deform flexibly, the cable member (100, 100A) including a mounting section which is mounted on the substrate (70, 70A), including a passage section which passes between the substrate (70, 70A) and the stationary barrel, and including a length adjusting section which is provided between the mounting section and the passage section and on the recessed section side with respect to the substrate (70, 70A) in the optical axis direction, wherein at least a part of the cable member (100, 100A) located on the larger diameter section side than the passage section in the optical axis direction is located between the stationary barrel and a movable barrel, wherein the length adjusting section gives, to the passage section, biasing force in a direction in which the passage section is separated from the large-diameter section along the optical axis direction.