can be used a plate-shaped package substrate having no concave portion as an exterior substrate, it provides an acceleration detecting device that may advance the lower profile strip of acceleration detection element 2, the first, is held by the second holding members 5 and 6 is formed with a plate-like structure, in the plate-like structure, the acceleration detecting at least one surface of the third surface 2c and the fourth surface 2d of the element 2 is, first, the first clamping member surface 5 b, 6 b and the second holding member face the second holding members 5 and 6 5c, are positioned inside the third surface 2c and the thickness direction connecting the fourth surface 2d than 6c, the acceleration detecting device 1
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