At least one exemplary embodiment is directed to a zoom lens including a plurality of lens units, in which an interval between respective adjacent lens units varies during zooming, an aperture stop, and a refractive optical element made of a solid material having an Abbe number (.nu.d) and a relative partial dispersion (.theta.gF) satisfying the following condition: .theta.gF-(-1.665.times.10.sup.-7.nu.d.sup.3+5.213.times.10.sup.-5.nu.d.s- up.2-5.656.times.10.sup.-3.nu.d+0.755)>0. The refractive optical element is located at a position in which distances (dw, dt) from the aperture stop to the refractive optical element on an optical axis at a wide-angle end and a telephoto end, respectively, satisfy the following condition: dt/dw>1.1.