A piezoelectric vibration piece includes: a base portion; a pair of vibration arm portions which extends in a first (+Y) direction from the base portion, and is arranged separately in a second (X) direction intersecting with the first (+Y) direction; and a support arm portion which extends in the first (+Y) direction from the base portion. The support arm portion, includes a first arm portion formed such that a width which is a length along the second (X) direction is gradually narrowed towards a tip end portion side of the support arm portion, and a second arm portion which extends in the first (+Y) direction from the first arm portion and is formed such that the width is broadened towards the tip end portion side.