A zoom lens includes N lens units, in which a lens unit having a positive refractive power is disposed closest to an object side. Each lens unit is moved to effect zooming. An (N−1)th lens unit and an N-th lens unit, counted from the object side, have positive refractive powers. The (N−1)th lens unit includes a first lens subunit having a positive refractive power and a second lens subunit having a negative refractive power in order from the object side to an image side. The second lens subunit is moved to have a component in a direction perpendicular to an optical axis to move an image position. A focal length fN of the N-th lens unit, a back focus bkt at the telephoto end, and an amount of movement mN of the N-th lens unit during zooming from a wide-angle end to a telephoto end are appropriately set.