Flat cable

The utility model relates to the technical field of conductive connection, in particular to a flat cable, which comprises N wire groups and an outer sheath, and N is an integer greater than or equal to 2. The N line groups are arranged in a K-row k-column mode, K * k = N, K and k are positive numbers, and K is greater than or equal to 2; the outer sheath wraps the N wire groups; each line group comprises a signal unit combination consisting of M signal units; the axes of the M signal units of the signal unit combination are coplanar and parallel at intervals; signal unit type combinations of the signal unit combinations of different line groups are different, and each signal unit type combination is composed of one or more of an electronic line unit, a coaxial line unit, a first differential signal line unit and a second differential signal line unit. According to the flat cable, the flat cable is designed to be composed of the multiple layers of wire groups, and the signal unit type combinations in each laye