An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element from an object side to an image side in order along an optical axis. The first lens element to the sixth lens element each include an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. A periphery region of the image-side surface of the second lens element is convex. An optical axis region of the image-side surface of the third lens element is concave. A periphery region of the object-side surface of the fifth lens element is concave. An optical axis region of the image-side surface of the sixth lens element is concave.