To suppress occurrence of a short circuit caused by the penetration of a foreign matter, dew condensation and so on, by separately arranging a plus side conductor passage and a minus side conductor passage on the front/rear surfaces of a print circuit board by which a cable for a fuel injection signal arranged in a housing and a plurality of fuel injection valves are conductively connected to each other.

A fuel injection valve connecting device 1 is equipped with a print circuit board 4 by which a cable for the fuel injection signal of an internal combustion engine arranged in a housing 2 and a plurality of fuel injection valves 3 are conductively connected to each other, and has one input connector projected in the center of the upper surface of the housing 2 and a plurality of power feeding connectors 6 concavely arranged on the lower surface of the input connector. These power feeding connectors 6 are formed into approximately square cylinder shapes so that a power receiving connector 3a can be fitted thereto. While, the print circuit board 4 is formed of a double-sided print circuit board, and a plus side conductor passage 8 is formed on one surface of an insulating board, and a minus side conductor passage 9 is formed on the other surface thereof. Hereby, a short circuit hardly occurs when the penetration of a foreign matter into the housing 2 and dew condensation, and so on, occur.