An optical communication module comprising: a first bi-directional multiplexer (16, 100); a second bi-directional multiplexer (17, 100); an optical fiber connecting the first bi-directional multiplexer and the second bi-directional multiplexer; at least one of first light emitting devices (11, 124a, 124b) connected to the first bi-directional multiplexer and operating in a first light emitting wavelength band; at least one of first light receiving devices (13, 124a, 124b) connected to the second bi-directional multiplexer and operating in a first light receiving wavelength band; at least one of second light emitting devices (14, 124a, 124b) connected to the second bi-directional multiplexer and operating in a second light emitting wavelength band that is different from the first light emitting wavelength band; and at least one of second light receiving devices (12, 124a, 124b) connected to the first bi-directional multiplexer and operating in a second light receiving wavelength band, wherein the first light emitting wavelength band is included in the first light receiving wavelength band, and the second light emitting wavelength band is included in the second light receiving wavelength band, characterized in that the first light emitting wavelength band and the first light receiving wavelength band are 620 nm to 870 nm, and the second light emitting wavelength band and the second light receiving wavelength band are 900 nm to 1680 nm, wherein each of the first bi-directional multiplexer and the second bi-directional multiplexer comprises: a first lens block including a lens array at one side of the first lens block; a second lens block including a lens surface corresponding to the lens array and combined with another side of the first lens block; a receptacle having an optical fiber ferrule fixed at a center of the receptacle and stacked on the second lens block; a base, the first lens block and the second lens block are sequentially stacked and inserted in the base; a printed circuit board, wherein at least the first light emitting devices, the first light receiving devices, the second light emitting devices, or the second light receiving devices are provided on a first surface of the printed circuit board; and a reinforcement plate contacting a second surface of the printed circuit boad. a first bi-directional multiplexer (16, 100); a second bi-directional multiplexer (17, 100); an optical fiber connecting the first bi-directional multiplexer and the second bi-directional multiplexer; at least one of first light emitting devices (11, 124a, 124b) connected to the first bi-directional multiplexer and operating in a first light emitting wavelength band; at least one of first light receiving devices (13, 124a, 124b) connected to the second bi-directional multiplexer and operating in a first light receiving wavelength band; at least one of second light emitting devices (14, 124a, 124b) connected to the second bi-directional multiplexer and operating in a second light emitting wavelength band that is different from the first light emitting wavelength band; and at least one of second light receiving devices (12, 124a, 124b) connected to the first bi-directional multiplexer and operating in a second light receiving wavelength band, wherein the first light emitting wavelength band is included in the first light receiving wavelength band, and the second light emitting wavelength band is included in the second light receiving wavelength band, characterized in that the first light emitting wavelength band and the first light receiving wavelength band are 620 nm to 870 nm, and the second light emitting wavelength band and the second light receiving wavelength band are 900 nm to 1680 nm, wherein each of the first bi-directional multiplexer and the second bi-directional multiplexer comprises: a first lens block including a lens array at one side of the first lens block; a second lens block including a lens surface corresponding to the lens array and combined with another side of the first lens block; a receptacle having an optical fiber ferrule fixed at a center of the receptacle and stacked on the second lens block; a base, the first lens block and the second lens block are sequentially stacked and inserted in the base; a printed circuit board, wherein at least the first light emitting devices, the first light receiving devices, the second light emitting devices, or the second light receiving devices are provided on a first surface of the printed circuit board; and a reinforcement plate contacting a second surface of the printed circuit boad. a first lens block including a lens array at one side of the first lens block; a second lens block including a lens surface corresponding to the lens array and combined with another side of the first lens block; a receptacle having an optical fiber ferrule fixed at a center of the receptacle and stacked on the second lens block; a base, the first lens block and the second lens block are sequentially stacked and inserted in the base; a printed circuit board, wherein at least the first light emitting devices, the first light receiving devices, the second light emitting devices, or the second light receiving devices are provided on a first surface of the printed circuit board; and a reinforcement plate contacting a second surface of the printed circuit boad.