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