The piezoelectric device (100) stores a piezoelectric vibrating piece (10) which vibrates whenever an electrical voltage is applied. The piezoelectric device comprises: a package lid (11) having a first peripheral surface (M1) which surrounds a plane surface in a predetermined width; and a package base (12) comprising a second peripheral surface (M2) bonded to the first peripheral surface of the package lid and a recess portion recessed from the second peripheral surface. The first peripheral surface of the package lid and the second peripheral surface of the package base are rough surfaces, respective metal films (AC1, AC2) are formed on each rough surface, and the package lid and the package base are bonded using a sealing material (LG) formed between the metal films.