Crystal unit

A crystal unit, which is an H-shaped-structure temperature-sensor-provided crystal unit, and the crystal unit comprising:

• a quartz-crystal vibrating piece;
• a first chamber that houses the quartz-crystal vibrating piece;
• a temperature sensor;
• and
• a second chamber, being stacked over the first chamber, and the second chamber housing the temperature sensor,
• wherein
• the quartz-crystal vibrating piece is mounted in the first chamber,
• the temperature sensor is mounted in the second chamber,
• the quartz-crystal vibrating piece has a square planar shape,
• the quartz-crystal vibrating piece is secured in the first chamber at two securing portions via conductive members, the two securing portions being in proximities of both ends of a first side of the quartz-crystal vibrating piece,
• the temperature sensor has a rectangular parallelepiped shape, and
• the temperature sensor is disposed within the second chamber such that a longitudinal surface of the temperature sensor is parallel to a line segment Y and the temperature sensor is close to a side of the two securing portions in the first chamber, when a line segment connecting the two securing portions is defined as the line segment Y.