Abstract: A miniature motor having installed motor components in a housing made of a metallic material and formed into a bottomed, hollow cylindrical shape with an opening at one end thereof; a cover made of a metallic material and formed into a plate shape being fixedly fitted to the opening, in which a plurality of minute ridges are provided on the outside circumferential surface of the cover, and the outside dimensions of the cover are made equal to, or slightly larger than, the inside dimensions of the housing opening so as to ensure a firm press-fit between the cover and the housing opening, thereby maintaining electrical contact between both.