An imaging lens includes five lenses for a solid-state image sensor, arranged in order from the object side to the image side, a first lens with positive refractive power having a convex object side surface, a second lens with negative refractive power having a concave image side surface, a third lens with positive or negative refractive power, a fourth lens with positive refractive power as a double-sided aspheric lens having a concave image side surface near an optical axis, and a fifth lens with negative refractive power as a double-sided aspheric lens having a concave image side surface near the optical axis, wherein the first lens and second lens satisfy conditional expressions below: 45