An imaging lens includes a first lens having a negative refractive power and a meniscus shape with a convex surface facing an object side; a second lens having a negative refractive power and a meniscus shape with a convex surface facing an object side; a third lens having a positive refractive power and a meniscus shape with a convex surface facing an object side; an aperture diaphragm; a fourth lens having a positive refractive power and a biconvex shape; a fifth lens having a negative refractive power and a biconcave shape and; and a sixth lens having a positive refractive power and a biconvex shape. The imaging lens as a whole is formed with the six lenses in six groups with six independent lenses, the imaging lens has a full angle of view of 150 degrees or more, and the imaging lens satisfies predetermined conditional expressions.