Abstract: An electronic device cabinet is provided which can be made compact and lightweight without impairing its heat radiation characteristic and which can avoid an increase in its production costs and degradation in its maintainability and which can be eco-friendly. The electronic device cabinet is composed of a frame-shaped side cover made of an ABS (Acrylonitrile Butadiene Styrene) resin, a rectangular top cover made of, for example, aluminum mounted in an upper portion of the side cover in a freely detachable manner and a rectangular bottom cover made of, for example, aluminum mounted in a lower portion of the side cover in a freely detachable manner.