Patent ID: 8773214

Claim:
A SAW device comprising: a SAW chip including a plate-shaped piezoelectric substrate and a comb electrode disposed on the piezoelectric substrate; a base substrate on which the SAW chip is mounted; and a fixing member that fixes the SAW chip to the base substrate and supports the SAW chip that forms a cantilever in a position where the comb electrode does not overlap with the fixing member in a plan view of the SAW chip, wherein the comb electrode is disposed on a surface of the piezoelectric substrate that faces away from the base substrate, a length W of the SAW chip in a first direction and a length D of the fixing member in the first direction satisfy 1<D/W≦1.6, the first direction being perpendicular to a direction in which a fixed end and a free end of the SAW chip are apart from each other in a plan view of the base substrate, and the fixing member bonds a surface of the fixed end of the SAW chip that faces the base substrate and a pair of side surfaces of the fixed end of the SAW chip that face each other in the first direction to the base substrate.