In a cable assembly 35 including signal lines 42a to 42c formed by core wires 45a to 45c, inner insulating bodies 46a to 46c, outer conducting bodies 47a to 47c, and outer insulating bodies 44a to 44c, respectively, the signal lines 42a to 42c in the cable assembly 35 are formed in a manner of exposing respective outer conducting bodies 47a to 47c from respective outer insulating bodies 44a to 44c in an area at least including respective distal edges, an array block 41 fixes the signal lines in a state where side surfaces of neighboring outer conducting bodies among the exposed outer conducting bodies 47a to 47c are in contact, and a core wire electrode part and an outer conducting body electrode part which is connected to a part of edge faces of the plurality of outer conducting bodies 47a to 47c fixed in the state where the side surfaces are in contact are formed on a circuit board to be connected to the cable assembly 35.
