To enable a pad to be more reliably and intimately attached to a treatment site even when attaching the pad to the treatment site of large curvature.A cord 40 includes connection terminal portions 42a, 42b, and 42c arranged to contact to and separate from a plurality of electrodes arranged on a pad 30 lead wires 43a, 43b, and 43c, connected to each connection terminal portion 42a, 42b, and 42c, for electrically connecting a low frequency treatment device body and the pad 30 and a coupling portion 44, made from an elastic material, for coupling the connection terminal portions 42a, 42b, and 42c wherein the connection terminal portions 42a, 42b, and 42c are independently arranged, and coupled by the coupling portion 44 to form one connection terminal portion group.
