To provide a metal closing type switch gear in which a cabinet body can accurately be placed on a foundation base.

Position determining through holes 8a, 8b are provided at the front surface and the rear surface of a bottom surface of cabinet bodies 11a, 11b. Position determining base holes 9a, 9b of almost the same size as the through holes 8a, 8b are provided to positions corresponding to those of the position determining through holes 8a, 8b at the upper surface of a base body 14. A position determining metal tool 7 with a smaller extremity and a larger body than those of the position determining through hole 8a and the base hole 9a is provided to the cabinet body 11a placed first on the base body 14. As a result, a tightening connecting metal 3a is mounted into a tightening tap 6a via a tightening through hole 5a, followed by placing the cabinet body 11b in the same manner as the cabinet body 11b, after centering the position determining through hole 8a and the position determining base hole 9a.