To manufacture a product of homogenous quality substantially and inexpensively.

The first element 1 is used as a positive electrode and the second electrode 2 as a negative electrode. At the time of contact with the skin, both elements 1 and 2 are electrically connected to each other via a resistor 3 laid in between. In addition, the first and second elements 1 and 2 are connected at the ends of the resistor 3 clamping the resistor 3. Also, the first and second elements 1 and 2, and the resistor 3 are formed as planar on a ceramic substrate 5 like a thin film, and arranged in a mounting recess 4a on the upper surface of a synthetic resin base 4.