A multi contact connector comprises a ground terminal block (7) having branched connections (7a), and a connector portion (6) having a plurality of contacts (1,1'). The branched connections (7a) of the ground terminal block (7) are connected to some of the contacts (1) of the connector portion (6) to be grounded. A method of manufacturing a multi contact connector comprises steps of producing a ground terminal block (7) having branched connections (7a) to be connected to contacts (1) to be grounded in accordance with requirement of a circuit to be connected, and connecting the branched connections (7a) with distal ends (1a) of the contacts (1) of a connector portion (6) separately produced. In a process of producing the ground terminal block (7), a ground terminal block having branched connections (7a) at different locations according to requirement of a circuit to be connected is produced every time when the contacts (1) to be grounded are changed, or a ground terminal block (7) having a great number of branched connections (7a) commonly formed for requirement of various circuits is produced and then unnecessary branched connections are removed to form a ground terminal block having the branched connections only required for requirement of a specific circuit to be connected.