The present invention relates to a bus structure, the configuration has the shape of a positive facing a room open cube, with a housing which is electrically insulated, is positioned in the housing, it is composed of a material electricity through a plurality of vertically the energizing plate member having a shape, and the laminated is placed in the part both ends of each conducting plate member, comprising: an insulating member for preventing the passage of electricity, the layer located on the upper side and lower side of the energizing plate members, respectively upper and lower and is bent such that together with the central position of the direction, the one of the other conducting plate member in the housing adjacent to the conducting plate member and that in the housing is doedoe coupled together, each of the energizing plate members that belong to each other, such as layer It is coupled to cross-energized, each of the energizing plate members belonging to mutually different layer doedo isolated by the insulating member Bond is, the energizing plate member is located in a plurality of said housing are coupled with each other successively as that characterized in that the energizing plate member by a desired length can be mutually coupled, excellent productivity than the conventional bus structure, the occupied area small installation space is reduced, high in the construction is easy and installation speed, cost and more competitive, it is possible to electrification also where the winding when winding the said housing the installation efficiency, can flow air into the interior of the housing excels it has an effect capable of reducing the temperature of the housing.