To provide a cooling device for an electronic device, locally cooling peripheries or the like of IC chips in various electronic devices and having excellent cool performance.

This piezoelectric fan device 100A includes: a piezoelectric fan section 110 composed of two plate-like piezoelectric elements 111 and a tabular elastic metal plates 112 fixing both the plate-like piezoelectric elements 111 and having length longer than those of the plate-like piezoelectric elements 111, and whose one end or the middle is supported and fixed in a cantilever manner by a support portion 130; and an AC circuit 120 applying AC voltage to the plate-like piezoelectric elements 111. In the piezoelectric fan device, an insulated layer 112a is provided on at least the outwardly exposed outer surface of the elastic metal plate 112. Thereby, there is no possibility of electrical shock, it is possible to provide improved safety, and also it is possible to suppress a reduction in amplitude to a lower level.