An optical imaging lens includes: an aperture stop, a first, second, third and fourth lens element arranged in order from an object side to an image side along an optical axis of the imaging lens. The image-side surface of the first lens element has a convex part in a vicinity of its periphery, the object-side surface of the second lens element has a concave portion in a vicinity of the optical axis, the object-side of the third lens element has a concave portion in a vicinity of the optical axis, and a convex part in a vicinity of its periphery; the object-side surface of the fourth lens element has a convex portion in a vicinity of the optical axis. The imaging lens satisfies T3/AAG≧1.4, (G12+G34)/T2≦1.4 and |V1−V4|≦20.