Vehicle electric wire and wire harness using the same

A vehicle electric wire comprising:

• an electrical insulation coating layer which contains:
• a vinyl chloride resin;
• a plasticizer which includes one type or two or more types selected from a trimellitic acid plasticizer and a pyromellitic acid plasticizer;
• a compound containing a lanthanoid which is at least one of lanthanum oxide and lanthanum hydroxide;
• a stabilizer;
• and a filler;
• and
• an electrical conductor which is coated with the electrical insulation coating layer,
• wherein, in the electrical insulation coating layer, with respect to 100 parts by mass of the vinyl chloride resin, a content of the plasticizer is 25 to 49 parts by mass, a content of the stabilizer is 1 to 15 parts by mass, and a content of the compound containing the lanthanoid is 1 to 15 parts by mass, and
• when dynamic viscoelasticity measurement using a dynamic viscoelasticity measurement device is performed on the electrical insulation coating layer at 0.5 Hz in frequency and under a temperature rise condition of 2° C./minute in temperature rise speed in a single cantilever measurement mode, a storage modulus at 140° C. is 0.1 MPa or more.