Abstract: A combination cabinet has a rear panel, two side panels, a front panel and a top panel. The rear panel has a top and two side edges. The side panels are connected respectively to the side edges of the rear panel. Each side panel has a top and a side edge opposite to the rear panel. The front panel is attached to the side edges of the side panels and has a top. The top panel is attached to the tops of the front, rear and side panels. The side panels are connected to the rear panel and the front panel with a single kind of detachable fastening devices. Each detachable fastening device has a male member and a female member combined detachably with each other. Accordingly, the combination cabinet is easy and convenient in assembling with a single kind of fastening devices.