A wide angle lens , comprising: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a diaphragm , a fifth lens (L5), a sixth lens (L6) and a seventh lens (L7) which are disposed in this order from an object side (La) to an image side (Lb), wherein the first lens (L1) is a negative meniscus lens whose convex surface is directed to the object side; the second lens (L2) is a negative meniscus lens whose convex surface (3*) is directed to the object side; the third lens (L3) is a negative meniscus lens whose concave surface (5*) is directed to the object side; the fourth lens (L4) is a positive lens whose convex surfaces (7*, 8*) are directed to the object side and the image side (Lb); the fifth tens (L5) is a positive lens whose convex surfaces are directed to the object side and the image side; the sixth lens (L6) is a negative lens whose concave surface (13*) is directed to the image side; and the seventh lens (L7) is a positive lens whose convex surfaces (14*, 15*) are directed to the object side and the image side; wherein the fifth lens is a glass lens; each of the convex surfaces of the fifth lens (L5) is a spherical surface; the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens are plastic lenses; the sixth lens (L6) and the seventh lens (L7) constitute a cemented lens (L8) which is constituted so that an image side face of the sixth lens and an object side face of the seventh lens are joined to each other with an adhesive ; and when a center curvature radius on an image side face of the fifth lens is R52 and a focal length of an entire wide angle lens is f0, the center curvature radius R52 and the focal length f0 satisfy the following conditional expression: 2 × f 0 ≦ R 52 ≦ 5 × f 0 . a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a diaphragm , a fifth lens (L5), a sixth lens (L6) and a seventh lens (L7) which are disposed in this order from an object side (La) to an image side (Lb), wherein the first lens (L1) is a negative meniscus lens whose convex surface is directed to the object side; the second lens (L2) is a negative meniscus lens whose convex surface (3*) is directed to the object side; the third lens (L3) is a negative meniscus lens whose concave surface (5*) is directed to the object side; the fourth lens (L4) is a positive lens whose convex surfaces (7*, 8*) are directed to the object side and the image side (Lb); the fifth tens (L5) is a positive lens whose convex surfaces are directed to the object side and the image side; the sixth lens (L6) is a negative lens whose concave surface (13*) is directed to the image side; and the seventh lens (L7) is a positive lens whose convex surfaces (14*, 15*) are directed to the object side and the image side; wherein the fifth lens is a glass lens; each of the convex surfaces of the fifth lens (L5) is a spherical surface; the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens are plastic lenses; the sixth lens (L6) and the seventh lens (L7) constitute a cemented lens (L8) which is constituted so that an image side face of the sixth lens and an object side face of the seventh lens are joined to each other with an adhesive ; and when a center curvature radius on an image side face of the fifth lens is R52 and a focal length of an entire wide angle lens is f0, the center curvature radius R52 and the focal length f0 satisfy the following conditional expression: 2 × f 0 ≦ R 52 ≦ 5 × f 0 . <EOS>