PURPOSE: To provide the low-frequency treating device which is highly flexural and is tightly stickable even to the sharply bent part of the body by providing the device with notches from its terminal edges toward the central part and forming tacky adhesive gels dividedly to plural parts.

CONSTITUTION: This low-frequency device consists of a main body circuit section 2 and conductor which are formed as an integral type. This main body circuit section 2 is disposed in the central part on the surface of an almost elliptic resin film 1. A pair of conductive materials (electrodes) 6a, 6b are formed on the rear surface of the resin film 1. These conductive materials 6a, 6b and the circuits of the main body circuit section 2 are electrically connected by rivets 7a, 7b disposed through the resin film 1. While the parts near these rivets 7a, 7b are coated with an insulating film 8, the tacky adhesive gels 9a, 9b respectively divided from each other are formed atop the conductive materials 6a, 6b and the notches (constrictions) 10a, 10b are formed from both side edges toward the central part of the resin film 1. This low-frequency treating device is highly flexural and permits sticking of the entire surface of the tacky adhesive gels 9a, 9b to the surface of the body along the curving part.