In this case, it is possible to offer such a technical effect that the movement of the third lens group G3 in the direction of the optical axis is not required.FIGS. 7A to 7C are sectional views which show a zoom lens in a second embodiment of the present invention, and among which FIG. 7A shows a short focal distance end condition, FIG. 7B is an intermediate condition and FIG. 7C is a long focald