Abstract: A quartz crystal unit with favorable frequency variation characteristics in response to changes in temperature and changes over time. A pair of lead wires provided perpendicularly to a base and a pair of supporters supported on the pair of lead wires are used for holding and electrically connecting a quartz blank at opposite points on the periphery thereof to which leading electrodes extend. The orientation of a line connecting holding points matches an axis on which stress sensitivity of the quarts blank exhibits the least value. A line connecting both supporting points for the supporters by the lead wires is disposed in a skew position with respect to another line connecting both holding points for the quartz blank. When the quartz blank is AT cut, an angle formed between these lines in the skew relationship is preferably set to approximately 30 degrees.