An optical imaging lens includes first to ninth lens elements sequentially arranged along an optical axis from an object side to an image side. Each of the first lens element to the ninth lens element includes 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. The second lens element has negative refracting power. The fifth lens element has negative refracting power and a periphery region of the object-side surface of the fifth lens element is concave. An optical axis region of the object-side surface of the sixth lens element is concave. The seventh lens element has negative refracting power. Lens elements of the optical imaging lens are only the nine lens elements described above to meet a condition ImgH/Fno≥2.700 mm.