To provide a zoom lens for a wide angle suitable for an image projection device.

The zoom lens equipped with a first lens unit arranged nearest to an enlargement side and having negative optical power satisfies a condition: -2.50f1/fw-1.36, wherein the focal length of the zoom lens at a wide angle end is defined as fw and the focal length of the first lens unit is defined as f1. The first lens unit has one or more negative lenses having an aspherical surface. When the effective diameter of the aspherical surface having the largest effective diameter out of the aspherical surfaces of the one or more negative lenses is defined as max, the focal length thereof is defined as flasp, and a distance in an optical axis direction between the position of the first aspherical surface on an optical axis and a position where the most off-axis light beam passes the first aspherical surface is defined as Rdepth, they satisfy conditions: -9.0max/f1-3.0 and -10.0Rdepth/flasp-4.0.