Micro coaxial cable for high bending performance

A micro coaxial cable for high bending performance is provided to obtain a mechanical reliable characteristic for a long time by including a helical winding conductor with a high bending characteristic. A micro coaxial cable for high bending performance includes an inner conductor(21), an insulating layer(23), and a helical winding conductor(27). The insulating layer surrounds the inner conductor. The helical winding conductor surrounds the insulating layer, is not annealed, and has an elongation of 1.5 to 4%. A helical winding pitch of the helical winding conductor is 3.0 to 5.0 mm. The micro coaxial cable further includes a protection coating layer(29) surrounding the helical winding conductor.