An optical imaging lens includes: a first, second, third, fourth, fifth and sixth lens element, the first lens element has an image-side surface with a concave part in a vicinity of its periphery, the second lens element has an object-side surface with a convex part in a vicinity of its periphery, the third lens element has an object-side surface with a convex part in a vicinity of its periphery, the fourth lens element has positive refractive power, the fifth lens element has an image-side surface with a concave part in a vicinity of the optical axis, the sixth lens element has an image-side surface with a concave part in a vicinity of the optical axis, wherein the optical imaging lens set does not include any lens element with refractive power other than said first, second, third, fourth, fifth and sixth lens elements.