An apparatus for holding a piezoelectric vibrator eliminates vibration energy loss and changes in vibration characteristics and stably supplies output at high efficiency. The apparatus for holding the piezoelectric vibrator is provided with a frame-shaped or box-shaped supporting member (11), which stores a piezoelectric vibrator (1) by having spaces in between; and a plate spring structure (12) arranged between the side portions of the supporting member (11) and the piezoelectric vibrator (1). The plate spring structure (12) is provided with a first plate spring member (13) which is adhered to the piezoelectric vibrator by being bent over the side portion of the piezoelectric vibrator to sandwich the facing side portions of the piezoelectric vibrator (1) from a base end portion adhered to one side portion of the supporting member (11); and a second plate spring member (18), which is adhered to the piezoelectric vibrator by being bent over the side portion of the piezoelectric vibrator (1) to sandwich the facing side portions of the piezoelectric vibrator (1) from a base end portion adhered to the other side portion of the supporting member (11). The first plate spring member (13) and the second plate spring member (18) are integrally formed by the adhering portion to the piezoelectric vibrator (1).
