An electrical stimulator (1, 2) is provided including: a base wire (10) configured with a core wire (21) and an outer winding wire (22) wound around the core wire (21) with the core wire (21) serving as a winding axis. The core wire (21) is entirely coated by an insulating film (211), and an annulus (20) is formed by spiraling or looping the base wire (10). One end of the core wire (21) is electrically connected to one end of the outer winding wire (22). The other end of the core wire (21) is connected to a first terminal of an external circuit (8). Further, the other end of the outer winding wire (22) is connected to a second terminal of the external circuit (8). Thus, the electrical stimulator (1,2) can apply an electrical stimulation to a part of a living body positioned in the annulus (20).
