A highly bendable insulated electric wire includes a conductor part that has a plurality of non-compressed strands made of a copper alloy, each of the non-compressed strands having a cross-sectional area of 0.13 sq. mm, and a covering part that is provided on the conductor part, wherein the conductor part has an elongation of 7% or more and a tensile strength of 500 MPa or more, and the covering part is made of 100 degree Celsius heat-resistant polyvinyl chloride and has an elongation of 100% or more at a temperature of −40 degree Celsius.