An electrical stimulation indoor bike includes a stationary bicycle; an electrical stimulation unit connected to the stationary bicycle either with wire or without wire, and including an electrode pad for applying electrical stimulation to a user's body; and a control unit to control electrical stimulation of the electrical stimulation unit in accordance with an exercise mode of the stationary bicycle. By the electrical stimulation indoor bike, a variety of electrical stimulation according to pedal movement is applied to a body through an indoor bike connected with a low-frequency stimulator, thereby maximizing exercise effect.