Provided is a zoom lens including, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a positive fourth lens unit and a rear lens group consisting of at least one lens unit. An interval between each pair of adjacent lens units is changed during zooming. The rear lens group includes a negative N-th lens unit configured to move during focusing. The second lens unit and the third lens unit are configured to move during zooming. A focal length of the second lens unit, a focal length of the third lens unit, a focal length of the fourth lens unit, a lateral magnification of the fourth lens unit at a wide angle end and a lateral magnification of the fourth lens unit at a telephoto end are appropriately set.