A multi-core cable includes a plurality of coaxial wires, each coaxial wire including a center conductor whose sectional area is 0.0006 mm2 to 0.25 mm2, a wrapping tape configured to cover all of the plurality of coaxial wires, and a sheath configured to cover the wrapping tape. The sheath is configured by a resin material coated with polyparaxylylene or fluorine resin in a thickness of 0.5 μm to 3.0 μm.