A connector, fixable to first and second bus bars having different electric potentials and mateable with a mating connector, includes an insulator accommodation member and first and second contacts. The accommodation member has first and second surfaces opposite each other in a predetermined direction perpendicular to a mating direction, and accommodates the contacts in a pitch direction perpendicular to the mating and predetermined directions. Under a fixed state, screwed portions of the first and second contacts are either flush with, or project outward beyond, the first and second surfaces, respectively, in the predetermined direction. Under the fixed state, the first and second contacts are screwed to the first and second bus bars, respectively, by first and second screws, respectively, inserted in screw holes thereof, and the screwed portions of the first and second contacts are in direct contact with the first and second bus bars, respectively.