VIBRATION-DRIVEN ENERGY HARVESTING DEVICE

Provided is a vibration-driven energy harvesting device that can enhance the power generation efficiency of the vibration-driven energy harvesting device even in a case where vibration is changed. The vibration-driven energy harvesting device includes: a vibration-driven energy harvesting element that generates power in accordance with vibration of an electrode; an output unit that supplies the power generated by the vibration-driven energy harvesting element to a load resistor once being connected to the load resistor; and an adjustment unit that adjusts an input impedance of the output unit in accordance with a signal corresponding to an acceleration in the vibration.