A lens barrel 10 comprises a first lens group frame 29, a rotating shaft 30, a plurality of barrier vanes 23a to 26b, an annular barrier sliding frame 28, and an annular stationary frame 27. The plurality of barrier vanes 23a to 26b rotate around the rotating shaft 30, and switch between an open state of exposing the surface of a first lens L1 in an imaging state, and a closed state of covering the surface of the first lens L1 in a collapsed state. The annular barrier sliding frame 28 is disposed on the subject side of the first lens group frame 29, and rotates the plurality of barrier vanes 23a to 26b upon rotating relatively around the optical axis with respect to the first lens group frame 29. The stationary frame 27 is disposed between the plurality of barrier vanes 23a to 26b and the barrier sliding frame 28 and fixed with respect to the first lens group frame 29, and supports the plurality of barrier vanes 23 a to 26b from the opposite side from the subject.