A zoom lens includes, in order from the object side, a positive first lens unit not moving for zooming, a negative second lens unit moving for zooming, positive third and fourth lens units moving for zooming, and a positive fifth lens unit not moving for zooming. Intervals between adjacent ones of the first to fifth lens units change for zooming. The third lens unit consists of positive, positive, and negative lenses in order from the object side. Appropriate settings are made to the zoom lens's focal lengths at the wide angle and telephoto ends, the lateral magnifications of the second lens unit at the wide angle and telephoto ends, the focal lengths of the third lens unit and the negative lens in the third lens unit, and the average Abbe number of the positive lenses and the Abbe number of the negative lens in the third lens unit.