An optical waveguide device includes a substrate, a metal layer arranged on the substrate, at least claddings arranged on the metal layer and in the claddings dents are formed, at least cores arranged in the claddings, whose end faces are exposed on the sides of the dents, for transmitting lights, optically non-transmissive material coating the inside faces of the dents except the sides on which the end faces of the cores are exposed, at least light receiving elements for receiving lights emitted from the end faces of the cores and inputting the lights into light receiving faces of the light receiving elements.

 
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