Communication cable and wire harness

The communication cable includes a two-core communication line including two insulated electric wires each having a conductor and an insulator covering the conductor; a drain wire; and a metal foil. The two-core communication line and the drain wire are collectively covered with the metal foil. The two insulated electric wires are twisted together. The insulator has a foaming ratio being equal to or smaller than 45%. The insulator may have the foaming ratio being equal to or greater than 28%. A wire harness may include the communication cable. 通信电缆包括：双芯通信线，该双芯通信线包括两条绝缘电线，每条绝缘电线具有导体和覆盖导体的绝缘体；排扰线；和金属箔。双芯通信线和排扰线共同覆盖有金属箔。两条绝缘电线绞合在一起。绝缘体具有等于或小于45％的发泡比。绝缘体可以具有等于或大于28％的发泡比。线束可以包括通信电缆。