An optical imaging lens includes: a first, second and third lens element. The first lens element has a positive refracting power, and has an object-side surface with a convex part in a vicinity of the optical axis, and a convex part in a vicinity of its periphery. The second lens element has a positive refracting power, and has an object-side surface with a concave part in a vicinity of the optical axis, and a concave part in a vicinity of its periphery, and has an image-side surface with a convex part in a vicinity of the optical axis. The third lens element has negative refracting power, and has an image-side surface with a concave part in a vicinity of the optical axis, and a convex part in a vicinity of its periphery.