PROBLEM TO BE SOLVED: To provide an ultrasonic oscillation device that is inexpensive by minimizing a processing cost of a piezoelectric monocrystal that is lead-free, a manufacturing method of the ultrasonic oscillation device, and ultrasonic medical equipment including the ultrasonic oscillation device.SOLUTION: An ultrasonic oscillation device 2 includes a laminated transducer 41 having plural piezoelectric monocrystalline element layers 61 (73) laminated between two metal blocks 32, 33, 39, and 44 (71 and 72). The two metal blocks 32, 33, 39, and 44 (71 and 72) and the plural piezoelectric monocrystalline element layers 61 (73) are fused and joined in a laminating direction with a joint metal 76 having a fusing point that is equal to or lower than a half of a Curie point of the plural piezoelectric monocrystalline element layers 61 (73).【課題】 非鉛である圧電単結晶の加工コストを低減させて安価とした超音波振動デバイス、この超音波振動デバイスの製造方法、超音波振動デバイスを備えた超音波医療装置の提供。【解決手段】 超音波振動デバイス２は、２つの金属ブロック３２，３３，３９，４４（７１，７２）間に複数の圧電単結晶素子層６１（７３）が積層された積層振動子４１を備え、複数の圧電単結晶素子層６１（７３）のキュリー点よりも半分以下の融点を有する接合金属７６によって２つの金属ブロック３２，３３，３９，４４（７１，７２）と複数の圧電単結晶素子層６１（７３）のそれぞれが積層方向に対して溶融接合されている。【選択図】図１２
