Provided is a zoom lens, including, in order from an object side to an image side, first, second, and third lens units having positive, negative, and positive refractive powers, respectively. The second lens unit moves toward image side during zooming from a wide angle end to a telephoto end, and an interval between adjacent lens units is changed during zooming. The first lens unit includes a lens pair of a positive lens (LP1) and a negative lens (LN1) that are arranged adjacent to each other. A refractive index of a material at 400 nm wavelength, a refractive index of a material at 1,050 nm wavelength, a refractive index of a material at 1,700 nm wavelength, an Abbe number and a partial dispersion ratio of a material, Abbe numbers and partial dispersion ratios of materials for the positive lens (LP1) and the negative lens (LN1) are each appropriately set.