Imaging lens and imaging unit

An imaging unit provided with an imaging lens and an imaging device, the imaging device outputting an imaging signal based on an optical image formed by the imaging lens, the imaging lens comprising:

• a first lens including a meniscus lens that has a convex surface facing object side and has positive refractive power near an optical axis;
• a second lens having a convex surface facing the object side and having negative refractive power near the optical axis;
• a third lens having positive refractive power near the optical axis;
• a fourth lens;
• a fifth lens having positive refractive power near the optical axis;
• and
• a sixth lens having negative refractive power near the optical axis and having an aspheric surface on most image plane side, the aspheric surface having an inflection point, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens being disposed in order from the object side toward the image plane side, wherein
• the imaging lens satisfies the following conditional expressions,
• f1/f5<1 (1)
• −0.9<(L5R1+L5R2)/(L5R1−L5R2)<4 (2)
• f2/f6>1 (3)
• where f1 is a focal length of the first lens, f5 is a focal length of the fifth lens, L5R1 is a paraxial radius of curvature of a surface, on the object side, of the fifth lens, L5R2 is a paraxial radius of curvature of a surface, on the image plane side, of the fifth lens, f2 is a focal length of
• the second lens, and f6 is a focal length of the sixth lens.