A differential signal transmission cable includes: two signal conductors; an insulator for covering these signal conductors; and a shield tape wound around the insulator in longitudinal wrapping. In the differential signal transmission cable, both ends of the shield tape in a direction of the winding around the insulator have a first overlapping region and a second overlapping region which overlap each other, and the first overlapping region of the shield tape is covered with the second overlapping region. In a tangent line of two tangent lines of a first signal conductor which is orthogonal to a line passing through centers of the signal conductors, when the tangent line positioned at radially outside of the first signal conductor is set to be a first tangent line, an end of the first overlapping region is positioned at outside of the first tangent line.