A coil device for antenna (40a, 40b, 60, 70) comprising: a winding coil (46, 46', 76); a bar-like magnetic core (47, 77) inserted into the winding coil (46, 46', 76); a connector terminal (43, 73) provided with a connector connecting section (43a, 73a) and a first engaging portion (41, 73b) for engaging one end of the winding coil (46, 46', 76) thereto; a mounting terminal (44, 54, 64, 74) provided with a mounting portion (44a, 54a, 64a, 74a) having a mounting surface (44f, 64f, 74f), and a second engaging portion (42, 52, 62a, 62b, 72a, 72b) for engaging the other end of the winding coil (46, 46', 76) thereto; and a resin member (45, 75) to which the mounting terminal (44, 54, 64, 74) and the connector terminal (43, 73) are attached and on which the winding coil (46, 46', 76) is mounted, wherein a main surface (43c, 73d) of the connector connecting section (43a, 73a) is perpendicular to the mounting surface (44f, 64f, 74f) of the mounting portion (44a, 54a, 64a, 74a), characterized in that: the connector terminal (43, 73) can take a first arrangement or a second arrangement relative to the resin member (45, 75); in the first arrangement, the connector connecting section (43a, 73a) is positioned at one end of the resin member (45, 75) and on one side in the width direction of the resin member (45, 75) and the first engaging portion (41, 73b) is positioned on the other side in the width direction of the resin member (45, 75); and in the second arrangement, the connector connecting section (43a, 73a) is positioned at the one end of the resin member (45, 75) and on the other side in the width direction of the resin member (45, 75) and the first engaging portion (41, 73b) is positioned on the one side in the width direction of the resin member (45, 75) by turning the connector terminal (43, 73) in the first arrangement through 180 degrees. a winding coil (46, 46', 76); a bar-like magnetic core (47, 77) inserted into the winding coil (46, 46', 76); a connector terminal (43, 73) provided with a connector connecting section (43a, 73a) and a first engaging portion (41, 73b) for engaging one end of the winding coil (46, 46', 76) thereto; a mounting terminal (44, 54, 64, 74) provided with a mounting portion (44a, 54a, 64a, 74a) having a mounting surface (44f, 64f, 74f), and a second engaging portion (42, 52, 62a, 62b, 72a, 72b) for engaging the other end of the winding coil (46, 46', 76) thereto; and a resin member (45, 75) to which the mounting terminal (44, 54, 64, 74) and the connector terminal (43, 73) are attached and on which the winding coil (46, 46', 76) is mounted, wherein a main surface (43c, 73d) of the connector connecting section (43a, 73a) is perpendicular to the mounting surface (44f, 64f, 74f) of the mounting portion (44a, 54a, 64a, 74a), characterized in that: the connector terminal (43, 73) can take a first arrangement or a second arrangement relative to the resin member (45, 75); in the first arrangement, the connector connecting section (43a, 73a) is positioned at one end of the resin member (45, 75) and on one side in the width direction of the resin member (45, 75) and the first engaging portion (41, 73b) is positioned on the other side in the width direction of the resin member (45, 75); and in the second arrangement, the connector connecting section (43a, 73a) is positioned at the one end of the resin member (45, 75) and on the other side in the width direction of the resin member (45, 75) and the first engaging portion (41, 73b) is positioned on the one side in the width direction of the resin member (45, 75) by turning the connector terminal (43, 73) in the first arrangement through 180 degrees. the connector terminal (43, 73) can take a first arrangement or a second arrangement relative to the resin member (45, 75); in the first arrangement, the connector connecting section (43a, 73a) is positioned at one end of the resin member (45, 75) and on one side in the width direction of the resin member (45, 75) and the first engaging portion (41, 73b) is positioned on the other side in the width direction of the resin member (45, 75); and in the second arrangement, the connector connecting section (43a, 73a) is positioned at the one end of the resin member (45, 75) and on the other side in the width direction of the resin member (45, 75) and the first engaging portion (41, 73b) is positioned on the one side in the width direction of the resin member (45, 75) by turning the connector terminal (43, 73) in the first arrangement through 180 degrees.