To rationally perform ejection of a coil, while making it hardly deviate from the calculated position and a real position, when performing the release of the insulating coating of a wire concerning a winding device for producing the coil by winding the wire around a winding core.

Plural winding cores 35 are located radially around the outer periphery of an index rotator 33 on an index device 30 of a winding device 1. The winding start side of a wire 3, wound around a winding core 35A at a winding position, is made into chained state without being cut until reaching the winding end side of the wire 3 wound around a winding core 35B at a wire cut position. At a coil ejecting position, according to the form of a cam surface (recessed part 38), to which the base end of the winding core 35 is abutted, the winding core 35 is moved back by the spring force of a spring 37, and a coil 4 is detached from the winding core 35.