An optical coupling lens includes a first lens portion and a second lens portion. The first lens portion includes a first main body and at least one first lenses. The first main body includes a first optical surface and a reflecting surface inclined at a predetermined angle relative to the first optical surface. The first lens is formed on the first optical surface. The second lens portion includes a second main body and at least one second lens. The second main body includes a second optical surface, a bottom surface, and a top surface opposite to the bottom surface. The second lens is formed on the second optical surface. The second lens portion defines a receiving hole passing through the bottom surface and the top surface. The first lens portion is detachably received in the receiving hole with the first optical surface facing toward the bottom surface.