Abstract: In order to connect fibers so as to ensure high efficiency of light transmission through connectors, fiber ends must be centered in terminals with a high degree of accuracy. In the proposed connector, each fiber terminal serves as a mold for the injection of a polymer or a fiber-retaining adhesive. A simple geometrical device is employed for centering the fiber end within its terminal, accuracy of centering being ensured solely by the device itself without being dependent on precision-machining of the terminal.The invention is applicable to either single or multiple connectors employed in optical-fiber data-transmission systems.