To provide a piezoelectric vibrator for an angular velocity sensor that has a detecting section and an exciting section for exciting the detecting section and has a structure capable of improving both excitation efficiency and signal detection efficiency.

The piezoelectric vibrator for the angular velocity sensor comprises a detecting section for detecting the angular velocity of the rotation motion about the rotation center with a piezoelectric effect corresponding to Coriolis force, and the exciting section that vibrates in a torsion vibration mode about the torsion center axis crossing the rotation center axis, connects the detecting section to a first part where a predetermined torsion displacement occurs, and excites the detecting section by torsion vibration. The piezoelectric vibrator has a supporting section that comprises a piezoelectric substrate and an electrode disposed on the surface section of the piezoelectric substrate, is connected to a second part as a node of the vibration in the torsion vibration in the exciting section, and supports the exciting section.

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