An imaging lens is essentially constituted by five lenses, including: a first lens of a biconvex shape; a second lens of a meniscus shape having a concave surface toward the image side; a third lens of a biconcave shape; a fourth lens of a meniscus shape having a convex surface toward the image side; and a fifth lens of a biconcave shape having at least one inflection point on the surface thereof toward the image side, provided in this order from the object side.