{HEAD ~ A piezoelectric resonator element} includes: a resonating arm extending in a first direction and cantilever supported; a base portion cantilever supporting the resonating arm; and an excitation electrode allowing the resonating arm to perform flexural vibration in {TAIL ~ a second direction} that is orthogonal to the first direction 
{ HEAD ~ A piezoelectric resonator element } includes : a resonating arm extending in a first direction and cantilever supported ; a base portion cantilever supporting the resonating arm ; and an excitation electrode allowing the resonating arm to perform flexural vibration in { TAIL ~ a second direction } that is orthogonal to the first direction
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