Provided is a lens barrel comprising a lens holding member that holds a lens; a guide axle that extends in a direction parallel to an optical axis of the lens; and an oil-retaining bearing that is fixed to the lens holding member, and into which the guide axle is slidably inserted. In the lens barrel, the guide axle and the oil-retaining bearing may be made of metal, and at least a portion of the lens holding member to which the oil-retaining bearing is fixed may be made of resin.