A coated electric wire for winding that includes an insulation coating including appropriate pores in a resin to suppress erosion due to partial discharge is provided. The present disclosure relates to a coated electric wire for winding that includes a conductor and an insulation coating that coats a periphery of the conductor, wherein the insulation coating includes a constant volume of pores having an average diameter equal to or more than a pore diameter (A) obtained by a specific measuring method.