An imaging lens, comprising: a first lens (L1) having a negative refracting power and having a meniscus shape in which a convex surface is directed toward an object side; a second lens (L2) having a negative refracting power and having a meniscus shape in which a convex surface is directed toward the object side; a third lens (L3) having a positive refracting power and having a meniscus shape in which a concave surface is directed toward the object side; an aperture stop; a fourth lens (L4) having a positive refracting power and having a bi-convex shape; a fifth lens (L5) having a negative refracting power and having a bi-concave shape; and a sixth lens (L6) having a positive refracting power and having a bi-convex shape, the first lens, the second lens, the third lens, the aperture stop, the fourth lens, the fifth lens, and the sixth lens (L1-L6) being arranged in order from the object side to an image surface side, the imaging lens being configured by six separate and independent lenses as a whole, the imaging lens having a total angle of view of 150 degrees or more, following conditional expression , conditional expression , and conditional expression being fulfilled, 44 < ν d1 Nd1 < 1.78 2.505 < f456/f < 3.5 where vd1: an Abbe's number in a d-line of the first lens (Ll) Ndl: a refractive index in the d-line of the first lens (Ll) f456: a synthetic focal length of the fourth lens (L4), the fifth lens (L5), and the six lens (L6) f: a focal length of an entire system. a first lens (L1) having a negative refracting power and having a meniscus shape in which a convex surface is directed toward an object side; a second lens (L2) having a negative refracting power and having a meniscus shape in which a convex surface is directed toward the object side; a third lens (L3) having a positive refracting power and having a meniscus shape in which a concave surface is directed toward the object side; an aperture stop; a fourth lens (L4) having a positive refracting power and having a bi-convex shape; a fifth lens (L5) having a negative refracting power and having a bi-concave shape; and a sixth lens (L6) having a positive refracting power and having a bi-convex shape, the first lens, the second lens, the third lens, the aperture stop, the fourth lens, the fifth lens, and the sixth lens (L1-L6) being arranged in order from the object side to an image surface side, the imaging lens being configured by six separate and independent lenses as a whole, the imaging lens having a total angle of view of 150 degrees or more, following conditional expression , conditional expression , and conditional expression being fulfilled, 44 < ν d1 Nd1 < 1.78 2.505 < f456/f < 3.5 where vd1: an Abbe's number in a d-line of the first lens (Ll) Ndl: a refractive index in the d-line of the first lens (Ll) f456: a synthetic focal length of the fourth lens (L4), the fifth lens (L5), and the six lens (L6) f: a focal length of an entire system. vd1: an Abbe's number in a d-line of the first lens (Ll) Ndl: a refractive index in the d-line of the first lens (Ll) f456: a synthetic focal length of the fourth lens (L4), the fifth lens (L5), and the six lens (L6) f: a focal length of an entire system. <EOS>