Provided is a zoom lens, comprising, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a negative refractive power; and a fourth lens unit having a positive refractive power. The second lens unit and the third lens unit are configured to move along loci different from each other during zooming. At least one lens unit of the first lens unit, the second lens unit, the third lens unit, or the fourth lens unit includes a positive lens and a negative lens that are arranged adjacent to each other, and materials for the positive lens and the negative lens are appropriately set, respectively.