A feedback device capable of easily adjusting loaded force for sphincter contracting exercise includes an outer enclosure, an outer cover, a mechatronic assembly and an electric conductive device； the electric conductive device includes a plurality of electric conductive sheets and the surface thereof is installed with a central column having a plurality of bumps. Through rotating the central column, the electric conductive sheets are enabled to perform a lever movement corresponding to the bumps (served as pivots) at different locations, thereby allowing different lever impedance value to be generated due to different pivot.
