A multilayer ultrasound vibration device includes a plurality of piezoelectric bodies and a plurality of electrode layers stacked together, wherein: the plurality of piezoelectric bodies are formed of a plurality of monocrystalline piezoelectric bodies and widths d2 and d3 of outer surfaces of the plurality of electrode layers in a stacking direction is made larger than a spacing distance d1 of the stacked plurality of monocrystalline piezoelectric bodies in the stacking direction.
