A zoom lens including: a positive first lens unit; a negative second lens unit; and a positive rear lens group, an interval of adjacent lens units is changed during zooming, the rear lens group includes from an object side: a positive lens system; an aperture stop; and a negative partial lens system, the first lens unit and the aperture stop are positioned closer to the object side at a telephoto end than at a wide angle end, and a combined focal length of a front lens system between the first lens unit and the aperture stop at the wide angle end, an absolute value of a distance on an optical axis from a first lens surface to the aperture stop at the wide angle end, a focal length of the first lens unit, and a focal length of the zoom lens at the wide angle end is appropriately set.