To provide a piezoelectric vibrator that enables collective processing in a wafer state while ensuring the flexibility in designing a wiring pattern provided inside a multilayer structure, thereby improving the efficiency of manufacture, to provide a method of manufacturing the piezoelectric vibrator, and to provide an oscillator.

The method includes a mounting step of mounting a piezoelectric piece 230 in a plurality of mounting regions 210 for mounting the piezoelectric piece 230 formed on a substrate 200 that includes glass and is made of ceramic that is baked at temperature lower than prescribed reference temperature.