To stably support a flexible printed wiring board, as for a lens barrel equipped with a storable optical element.

The lens barrel is provided with a straight advancing/retreating ring 8 which is guided straight in an optical axis direction and retreats when changing from a photographing state to a storage state, a retreating movable member 6 which is supported so that it can be moved in a direction containing components orthogonal to the optical axis inside the ring 8 while supporting the retreat optical element partly constituting a photographing optical system, a photographing position holding means for holding the member 6 while positioning the retreat optical element on the same optical axis as that of another optical element in the photographing state, a retreating/moving means for making the retreat optical element to retreat to a position different from the optical axis of another optical element, and the flexible printed wiring board 77 for connecting electronic components arranged inside the ring 8 to an electronic circuit arranged outside the ring 8, and the member 6 is separated from the flexible printed wiring board in a photographing position, on the other hand, in the retreat position, the flexible printed wiring board is supported by the member 6 in a contact state with the inside diameter side of the ring 8.