To provide a flat cable adaptable for manufacturing a coil, particularly, for manufacturing a large-diameter coil and a coil, particularly a large- diameter coil having bean improved of workability and strength.

The flat cable comprises a plurality of magnet wires (2) arranged in a mutual contact in parallel between two insulating tapes (1), (1) to form magnet wire parallel lines (20) with the magnet wires (2) exposed at both ends over a given length to form connection terminal portions (40a), (40b). A coiling flat cable (30) has the connection terminal portions (40a), (40b) abutted to each other and the magnet wires (2) of the magnet wire parallel lines (20), parallelly arranged in mutual contact, shifted one by one and connected to each other to form a coil.