A server rack according to the present invention mounts a plurality of servers. The server rack includes a plurality of central power supply units, each of which arranged between the plurality of servers with regular intervals, each of the plurality of central power supply units supplying electric power to one or more of the servers; and a direct-current power supply cable that connects the server and the central power supply unit. The direct-current power supply cable connects each of the servers and the central power supply units within a range of a predetermined distance.