An optical fiber connector adapter for coupling a first optical fiber connector to a second optical fiber connector includes a lens body. The lens body includes a first surface and an opposite second surface. A positioning hole is defined in the first surface. A lens hole is defined in the first surface and a first lens is formed on a bottom in the lens hole. The first lens is beneath the first surface and adjacent to the positioning hole. A positioning post and a second lens protrude from the second surface. The second lens is aligned with the first lens. An optical fiber connector assembly having the optical fiber connector adapter is also provided.