An image taking lens forming an optical image on an solid-state image
pickup element according to the present invention, is provided with, in
order from an object side thereof: a first lens with a positive power; a
second lens with a negative power; and a third lens with a negative
power. Third lens includes an image side surface in an aspheric shape
such that a region around an optical axis in the aspheric shape is formed
in a concave shape facing an image side of the image taking lens and a
peripheral region in the aspheric shape surrounding the region around the
optical axis is formed in a convex shape facing the image side of the
image taking lens. The image taking lens fulfills a predefined
conditional formula.