PURPOSE: A socket-type small scale element light module is provided to reduce the signal loss and the signal interference by implementing a matching circuit on an inner portion or both ends of a socket structure. CONSTITUTION: A light transmitter module(100) comprises package(115), a substrate(101), a luminous element(103), and a light receiving element(104). The package(115) is provided with a focusing unit on its front. The substrate(101) is attached on a lower surface within the package(115). The luminous element(103) is attached on an upper of the substrate(101). The focusing unit comprises a lens inserting hole(122), a transmitting lens(116), and a transmitting guide pipe(118). The lens inserting hole(122) and the transmitting lens(116) are formed on the front of the package(115). The transmitting guide pipe(118) is provided with a hollow(118a) where a transmitting ferrule(112) is inserted into. The transmitting lens(116) is fixed at a predetermined position within the lens inserting hole(122) in order to concentrate a light from the luminous element(103) on a core of an optical fiber(111) in the transmitting ferrule(112).
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