To manufacture a piezoelectric vibrator having high air-tightness with excellent workability.

In this manufacture method for a piezoelectric vibrator, a base 1 on which the piezoelectric vibrator chip is mounted and a cover containing the piezoelectric vibrator chip therein and fixed to the base 1 form a package. An opening 8 with a 1st hole 21 with a prescribed inner diameter and a 2nd hole 22 with an inner diameter larger than that of the 1st hole 21 is provided to part of the package, a sealing member 9 provided with an outer size larger than the hole diameter of the 1st hole 21 of the opening 8 and smaller than the hole diameter of the 2nd hole 22 is applied to the opening 8 and a sealing beam is emitted to the sealing member 9.