Lens barrel 3 is provided with a first lens frame (first group lens frame 10) holding a first lens group (first group lens G1), a second lens frame (second group lens frame 20) holding a second lens group (second group lens G2), and resilient members (leaf springs 14). Second lens frame 20 is disposed inside of first lens frame 10, and furthermore, can be moved relatively to first lens frame 10 in the direction of optical axis AX. The resilient members (leaf springs 14) are disposed between first lens frame 10 and second lens frame 20 in such a manner as to urge second group lens frame 20 inward against first lens frame 10.