A movable lens hood mechanism of a zoom lens includes a plurality of lens groups guided linearly in a direction of an optical axis to change a focal length of the zoom lens; a first cam barrel rotatably driven to move the plurality of lens groups in the optical axis direction; a movable hood barrel having a photographic aperture positioned in front of the frontmost lens group and guided linearly in the optical axis direction; and a feed mechanism which drives the movable hood barrel forward/rearward in the optical axis direction relative to the frontmost lens group by rotation of the first cam barrel so that a space between the photographic aperture of the movable lens hood and the frontmost lens group in the optical axis direction varies in accordance with a variation of a focal length of the zoom lens.