A coiled cable (10) has a conductor coil (12) formed into a coil shape having a coil average diameter (D) by winding four conductor base lines (21-24} with a diameter (d) to each of which art insulating coating layer (42) is applied. The conductor coil (12) is set to have an spring index (D/d) represented by 2≦D/d≦4, and each of the conductor base lines (21-24) is configured by twisting a plurality of materials that have φ0.008 to φ0.05 and that are made of tough pitch copper, oxygen-free copper, or copper alloy wire.