Electric wire conductor, covered electric wire, and wiring harness

A wiring harness comprising:

• a first covered electric wire comprising:
• an electric wire conductor comprising a wire strand comprising a plurality of elemental wires twisted together, the electric wire conductor being made of aluminum or an aluminum alloy;
• and
• an insulator covering the electric wire conductor,
• wherein:
• the wire strand is compressed from a first direction and a second direction opposing to each other, and from a third direction and a fourth direction opposing to each other and intersecting the first direction and the second direction,
• the electric wire conductor has a flat portion where a cross-section of the wire strand intersecting an axial direction of the wire strand has a flat shape, and
• the elemental wires comprise first elemental wires which have non-circular shapes in the cross-section of the wire strand intersecting the axial direction of the wire strand, and second elemental wires which have a circular shape in the cross-section;
• and
• a second covered electric wire, the second covered electric wire comprising a second electric wire conductor made of copper or a copper alloy having a lower flatness and a smaller conductor cross-sectional area than the electric wire conductor of the first covered electric wire.