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 {HEAD ~ the resonating arm} to perform {TAIL ~ flexural vibration} in a second direction that is orthogonal to the first direction 
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 { HEAD ~ the resonating arm } to perform { TAIL ~ flexural vibration } in a second direction that is orthogonal to the first direction
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