A conductive coil for transmitting power or receiving power in a contactless manner with a stacked multi-layered coil structure which comprises in each layer a winding wire portion formed of a wire wound multiple times in a plane, wherein the number of the turns of the winding wire portion in each layer is larger than the number of the layers in the multi-layered coil structure characterized in that the winding wire portion in each layer includes a first winding portion (a1, b1, c1, a3, b3, c3, a5, b5, c5) formed by performing a single turn of winding in each layer in a same winding direction from a bottom layer to an uppermost layer and a second winding portion (a2, b2, c2, a4, b4, c4, a6, b6, c6) formed by performing a single turn of winding in each layer in a same winding direction from the uppermost layer to the bottom layer, and the winding directions of the first winding portion (a1, b1, c1, a3, b3, c3, a5, b5, c5) and the second winding portion (a2, b2, c2, a4, b4, c4, a6, b6, c6) are identical to each other, and the first winding portion (a1, b1, c1, a3, b3, c3, a5, b5, c5) and the second winding portion (a2, b2, c2, a4, b4, c4, a6, b6, c6) are joined in the uppermost layer or the bottom layer, wherein a magnetic member and a metallic plate are disposed at a side of the coil structure which is opposite to a side of the coil structure configured for facing another coil structure for transmitting power or receiving power in a contactless manner, wherein the metallic plate is composed of an aluminum plate or a copper plate, and wherein the magnetic member is disposed between the coil structure and the metallic plate , such that due to the multi-layered coil structure of the coil an imbalance of a parasitic capacitance with the metallic plate is inhibited. wherein the number of the turns of the winding wire portion in each layer is larger than the number of the layers in the multi-layered coil structure characterized in that the winding wire portion in each layer includes a first winding portion (a1, b1, c1, a3, b3, c3, a5, b5, c5) formed by performing a single turn of winding in each layer in a same winding direction from a bottom layer to an uppermost layer and a second winding portion (a2, b2, c2, a4, b4, c4, a6, b6, c6) formed by performing a single turn of winding in each layer in a same winding direction from the uppermost layer to the bottom layer, and the winding directions of the first winding portion (a1, b1, c1, a3, b3, c3, a5, b5, c5) and the second winding portion (a2, b2, c2, a4, b4, c4, a6, b6, c6) are identical to each other, and the first winding portion (a1, b1, c1, a3, b3, c3, a5, b5, c5) and the second winding portion (a2, b2, c2, a4, b4, c4, a6, b6, c6) are joined in the uppermost layer or the bottom layer, wherein a magnetic member and a metallic plate are disposed at a side of the coil structure which is opposite to a side of the coil structure configured for facing another coil structure for transmitting power or receiving power in a contactless manner, wherein the metallic plate is composed of an aluminum plate or a copper plate, and wherein the magnetic member is disposed between the coil structure and the metallic plate , such that due to the multi-layered coil structure of the coil an imbalance of a parasitic capacitance with the metallic plate is inhibited. <EOS>