Disclosed is a flat cable formed by braiding ultra-high molecular weight polyethylene fibers, in which degree of the fibers close contact in a condition where no tensile force is applied is elevated compared with conventional ones. The cable is a flat cable formed by braiding ultra-high molecular weight polyethylene fibers, the area of whose cross section under a load of no tensile stress is not more than 110% of the cross section area under a load of a tensile stress of 22.7 N/mm2.