Crystal unit

In a crystal unit, at least two places of an outer circumference of a quartz crystal blank, which are places that correspond to both ends of a stress sensitivity zero axis of the crystal blank, are supported by supporters and fixed to the supporters by conductive adhesives. Each supporter includes; a vertical portion with a surface extending vertically, a slit formed in the vertical portion as extending vertically and with both ends thereof being closed, and a tongue portion projecting from a lower end of the slit. Each conductive adhesive includes; a first portion formed between the tongue portion and a lower surface of the crystal blank, a second portion extending to an end face of the crystal blank from an outer surface of the supporter and through the slit, and a third portion formed between an inner surface of the supporter and an upper surface of the crystal blank.