A case 1 comprises a base 2 and a cover 3, a terminal is disposed in the case, an electric wire 8 connected to the terminal is arranged in the base, a cutout portion 12 to bend and guide out the electric wire is penetrated and formed in the base 2, and an electric equipment module structure in which the outside opening of the cutout portion is closed by the cover is adopted. A projection 13 pressing the electric wire 8 in the cutout portion 12 is formed in the cover 3, and the electric wire is bent along with the projection 13. The base 2 and cover 3 have a connection portion 14 at the end, and have a connected portion 15 at the other end, respectively, and a plurality of cases 1 can be connected mutually. The connection portion 14 biases the base 2 and cover 3 in the closing direction.