To provide a wide angle lens that projects onto a screen and the like an enlarged image from a light valve such as a DMD for forming an image by changing a reflection direction of light, has high performance, has a small lens aperture, and is compact.

A wide angle lens is constituted of a first lens group having negative refractive power as a whole, a second lens group having negative refractive power as a whole, a third lens group having positive refractive power as a whole, and a fourth lens group having positive refractive power as a whole in this order from an enlargement side. The first lens group is constituted by arranging two lenses including a negative lens having a convex shape and a negative lens in this order from the enlargement side. The second lens group is constituted by arranging two lenses including a negative lens having a concave shape and a lens having positive refractive power (hereinafter, positive lens) in this order from the enlargement side. The third lens group is constituted by arranging seven lenses including a positive lens, a positive lens, a negative lens, a positive lens, a positive lens, a negative lens, and a positive lens in this order from the enlargement side. The fourth lens group is constituted by arranging one positive lens.