A lens barrel includes an electronic component provided in the lens barrel so that a position of the electronic component in the lens barrel is adjustable; a flexible printed wiring board connected to the electronic component and installed to extend along a surface of an internal component of the lens barrel in a direction to adjust the position of the electronic component; and a low-repulsion layer interposed between the surface of the internal component and a surface of the flexible printed wiring board which faces the surface of the internal component.