Insulated wire

The present invention provides an insulated wire which suppresses the occurrence of partial discharge and also suppresses the occurrence of film rupture even when used in a coil of a motor for high-voltage driving or inverter driving. In an insulated wire having a long conductor and an insulating film formed by laminating one or more insulating layers covering the periphery of the conductor, the insulating layer has a hole region and a resin region. The void region is composed of a resin and a plurality of voids. The resin region is made of resin. The insulating layer is not provided with an interface between a first interface on the inner side in the radial direction and a second interface on the outer side in the radial direction, and is provided with an empty hole region and a resin region in this order from the first interface along the second interface. 本发明提供一种绝缘电线，即使在用于进行高电压驱动、逆变器驱动的电机的线圈的情况下，也抑制局部放电的发生而且抑制皮膜破裂的发生。在具有形成为长条状的导体和将一层或多层覆盖导体周围的绝缘层层叠而构成的绝缘皮膜的绝缘电线中，绝缘层具有空孔区域和树脂区域。空孔区域由树脂和多个空孔构成。树脂区域由树脂构成。绝缘层在