An image pickup lens for forming a subject image on an photoelectric
converter of a solid-sate image pickup element, includes: an aperture
stop; a first lens having a positive refractive power; a second lens
having a negative refractive power; a third lens having a positive
refractive power; and a fourth lens having a negative refractive power.
The aperture stop and the first to fourth lenses are arranged in this
order from an object side of the image pickup lens, and the image pickup
lens satisfies predefined condition.