PROBLEM TO BE SOLVED: To provide a physical strength improvement device which, even if a human body remains charged with static electricity, can well supply the human body with low frequency or microcurrent to quickly improve the physical strength effectively and continuously.SOLUTION: A physical strength improvement device 10 includes an electric current generator 1 in the shape of a hexagonal column, a pair of electrodes 3 each shaped like a fountain pen, an output terminal 15 provided at the current generator 1, and a pair of leads 4 for connecting the output terminal 15 with the electrode 3. There is provided a glass tube 26 included within the inside of each of the six corners of the current generator 1. The electrode 3 includes a case, first and second glass containers, a motor, an eccentric weight and electric cells. The glass tube 26, the first and second glass containers respectively include negatively electrified granulated or powdered Si and SiOx (0
