PROBLEM TO BE SOLVED: To perform assembly safely and easily in a short time without using a jig.SOLUTION: A clip electrode comprises: first and second plate pieces 10, 20 having bearing parts 11, 21； a shaft rod 40 inserted into shaft holes 12, 22 of the bearing parts 11, 21 provided in the first plate piece 10 and the second plate piece 20； a spring 30 having a first end 31 in contact with the first plate piece and a second end 32 in contact with the second plate piece； a spring placing part 16 provided in the first plate piece for placing the spring at a position that matches the shaft holes； a positioning part 17 for positioning the first end of the spring 30 placed on the spring placing part 16； a movement suppressing part for suppressing the movement of the spring placed on the spring placing part 16； and an electrode 50 provided in an organism holding part.
