Abstract: An optical imaging lens includes first, second, third, fourth, fifth and sixth lens elements arranged in order from the object side to the image side. The first lens element has an image-side surface with a concave portion in a vicinity of its periphery, the third lens element has positive refractive power and an object-side surface with a convex portion in a vicinity of its periphery, the fifth lens element has negative refractive power, and the sixth lens element has an image-side surface with a concave portion in a vicinity of the optical axis.