PURPOSE: To provide a zoom lens with high performance applicable as a lens for general photography and as providing a vibrationproofing function.

CONSTITUTION: A zoom lens formed with four lens groups with positive, negative, positive, and positive refracting power and equipped with a vibration proofing image position displacement means which performs vibrationproof by moving a second lens group to an image side and a third lens group G3 in a direction intersecting almost orthogonally to an optical axis at the time of performing variable from power a wide angle end to a telephoto end is comprised so as to satisfy a relation ΔY= f4/f3.ΔS assuming the amount of travel in a direction intersecting orthogonally with the optical axis of the 3rd lens group G3 as ΔS and the focal distance of the third lens group as f3, that of a fourth lens group as f4, and the amount of travel of an image at the time of the variable power as ΔY.