To provide an antenna for a non-contact data transmitting/receiving body having a pattern-shaped conductive part for adjusting an electrostatic capacity capable of preventing any electromagnetic wave from being interrupted, easily adjusting the electrostatic capacity, and preventing any communicating function from being deteriorated.

A plurality of plate-shaped conductive parts 9 are arranged through an insulating part 8 or a base material 2 so as to be positioned on the perpendicular of an antenna 1, and a conductive line 11 to which the plate- shaped conductive parts 9 are connected is connected to the antenna 1, and a leading part 12 where the plate-shaped conductive parts 9 are connected to the conductive line 11 is arranged so as not to be positioned on the perpendicular of the antenna 1, and the leading part 12 is split.