A connector mounted on a board having a plurality of board signal lines for transmitting a signal and a board ground line grounded. Each of the plurality of board signal lines includes a plurality of signal terminals formed in correspondence to each of the signal lines. Each of the signal terminals comprises: a signal core line formed of conductor by extension in the shape of a line; a shield for core line formed of conductor insulated from the signal core line electrically so as to extend in an axis direction of the signal core line and enclose the signal core line; a signal electrode formed by extension from the signal core line for connecting the signal core line with the board signal line corresponding to the signal terminal; and a plurality of ground electrodes extended from the shield for core line and opposed to each other by intervention of the signal electrode for connecting the shield for core line with the board ground line respectively.
1. A first connector including a signal terminal for transmitting a signal, said signal terminal comprising:
a signal core line formed from a conductor that is generally linear in shape for-connecting to a signal core line of a second connector; and
a core line shield formed from a conductor that is electrically insulated from said signal core line,
wherein the core line shield includes a circle-shaped extension protruding from inside the core line shield that surrounds the signal core line cylindrically in the vicinity of an end of the signal core line.