PURPOSE: To provide a Scott connected transformer for reducing manufacturing operation time, improving the occupation rate of a coil winding, and reducing dimensions, weight, cost, and size.

CONSTITUTION: A stable coil winding circuit is formed as a closed circuit where stable coil windings 3 and 4 wound around two iron core legs of a main seat are connected in series, the lower edge of three-phase side coil windings 5 and 6 of the main seat is connected as a middle point O, the upper edge of the three-phase side coil winding 5 of the main seat and the upper edge of the three-phase side coil winding of the main seat are used as U and W terminals, respectively, the lower edges of three-phase side coil windings 11 and 12 of T seat are connected to the middle point O, the upper edge of the three-phase side coil windings 11 and 12 of T seat are connected in parallel with and are led out as V terminal, and the lower edges of two-phase side coil windings 13 and 14 are connected in series. Then, the upper edge of the two-phase side coil winding 13 of the T seat is used as v terminal, the upper edge of the two- phase side coil winding 14 of the T seat is used as o terminal, the lower edges of two-phase side coil windings 7 and 8 of the main seat are connected in series, and the upper edge of the two-phase side coil winding 7 of the main seat is used as auterminal, and the upper edge of the two-phase side coil winding 8 of the main seat is used as ou terminal Scott connected transformer.