PURPOSE: To obtain a piezoelectric acceleration pickup which can detect acceleration in a plurality of directions while reducing the cost of component and the labor of assembling work.

CONSTITUTION: Weights 15, 16, a plurality of piezoelectric elements 17, 18, 19, 20, and insulating pieces 21, 22 between the plurality of piezoelectric elements are stacked and secured to a supporting part by means of a bolt 14 thus constituting an acceleration detecting part 4. The insulating piece 21, 22 comprises a basic member 23 made of an insulating polymer material applied with electrodes 24, 24 to the opposite sides The acceleration detecting part 4 is fixed tightly to the supporting part 2 through the bolt 14 being driven into the threaded part 15a, 16a of the weight 15, 16.