To easily form an electrode without short-circuiting an electrode for excitation provided on a side face of a vibration arm unit.

A tuning-fork type bending crystal vibration element comprises: a base part; two pairs of vibration arm parts extending from the base part; and a projecting part that is positioned in the middle of the two vibration arm parts, extends in the same direction as that of the two pairs of vibration arm parts from the base part, and is formed to be shorter than the vibration arm parts. In the projecting part, a slit is provided along an extension direction, and the slit penetrates in a thickness direction and has a length from the tip of the projecting part to a boundary to the base part.

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