Abstract: A cabinet includes a structural frame including a plurality of connecting rods and a plurality of connector modules each of which includes first and second connectors. The first connector includes two first main plate portions perpendicularly connected to each other, a first fastening hole, and a limiting indented portion. The second connector includes a second main plate portion perpendicular to the first main plate portions, a seat body connected to the second main plate portion and having a first fastening hole corresponding in position to the first fastening hole of the first connector, and a limiting protruding portion protruding from the second main plate portion and having a shape complementing with that of the limiting indented portion.