A high-voltage conduction path includes one conductor of a positive electrode conductor and a negative electrode conductor, a first insulator on the outside of the one conductor, the other conductor of the positive electrode conductor and the negative electrode conductor, the other conductor on the outside of the first insulator, and a second insulator on the outside of the other conductor. The other conductor is made of a metal wire material and formed into a cylindrical shape by spirally winding the metal wire material, and portions of the metal wire material positioned to be adjacent to each other contact with each other at side end faces opposed to each other.