A server cabinet includes a housing, a switch, and two fastening members. The housing includes two posts. The switch includes two opposite sidewalls. Each fastening member includes a fastening plate with a first end of the fastening plate fastened to a corresponding post, a connection plate slantingly extending from the fastening plate, and two mounting plates respectively extending from a second end of the fastening plate and a distal end of the connection plate and perpendicular to the fastening plate. The mounting plates of each fastening member are fastened to a corresponding sidewall.