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