PURPOSE: To improve manufacturing efficiency by applying an original solution into at least two pairs of recession parts, curing it, and intermittently forming a water bearing gel layer having a double structure on a base material sheet.

CONSTITUTION: On the upper surface of a lower mold frame 1000 at which ≥two pairs of recession parts 11101 and 11201... are formed, a porous insulating base material sheet 300 is placed. Next, an upper mold frame 2000 at which through holes 21101 and 21201... are formed is placed, and conductive and viscotic acrylic water bearing gel original solutions G1 and G2... are injected from through holes 2101 and 2120.... Next ultraviolet wave rays are irradiated, after curing them, the water bearing gel layer and the base material sheet 300 on an organism side and an electrode side are unitedly punched by means of prescribed punching mold frame k1Wkn, and pads P1WPn are formed.