The invention provides a self-energized bladder pacemaker, which is characterized by comprising a
pulse generator, an exciting
electrode, and a power generation portion. The power generation portion comprises a power generation main body, an output unit, an
electric energy storage unit, a fixing unit, and a packaged layer. The power generation main body is in a multilayered
film structure, comprising a piezoelectric material layer on the center of the power generation main body and
electrode layers on two sides of the piezoelectric material layer. The power generation main body is adhered to the surface of a heart to acquire energy of the heart to generate
electric energy. The output unit is connected with the
electrode layers, and the output unit is used to output current generated by the power generation main body to the
electric energy storage unit. The electric
energy storage unit is used to store electric energy and supply power for the
pulse generator. The fixing unit is on the edge of the power generation main body, and is used to fix the power generation main body on the epicardium. The packaged layer covers the surfaces of the power generation main body, the output unit, the electric
energy storage unit, and the fixing unit. The self-energized bladder pacemaker does not need to change batteries, and can be used for whole life.