An antenna coil includes: a core (3) having a magnetic material formed into a bar shape; a bobbin (1) having a through hole (12) through which the core (3) is inserted; a connection section (15) fixed to the bobbin (1) in such a manner that it extends from the bobbin (1) in the length direction of the core (3) when the core (3) is inserted into the through hole (12); a winding (14) wound on the bobbin (1) and having a terminal connected to the connection section (15); and a connector terminal (25) arranged at a certain position in the length direction of the core (3) for fixing the connection section (15) and deciding the position of the winding (14) in the length direction of the core (3).