PURPOSE: To eliminate the assembling process of a cooling fluid path and reduce the cost of a vehicle by a method wherein the cooling fluid path of the fuel distributing pipe is provided in the fuel distributing pipe.

CONSTITUTION: A fuel path 2 and the cooling fluid path 3 are provided in the fuel distributing pipe 1 lengthwisely in parallel mutually, while both ends 5 of the fuel distributing pipe 1 are provided with blind rids. The wall surface 6 of a side wherein the fuel path 2 is provided is bored with fuel injection valve attaching holes 7 which are communicated with the fuel path 2. Both ends of the side wall surface 6 are bored with a fuel supplying port 8 and a fuel discharging port 9. Both ends of the wall surface 10 of the side wherein the cooling fluid path 3 is provided are bored with a cooling fluid supplying port 11 and a cooling fluid discharging port 12 which are communicated with the cooling liquid path 3. According to this method, the cooling fluid path is provided in the fuel distributing pipe, therefore, the assembling process may become unnecessary and the cost of the whole of the vehicle may be reduced lower than heretofore.