To provide: a piezoelectric actuator that can make a fixing member as a low rigidity and simple one; and an electronic apparatus provided with the piezoelectric actuator.

A piezoelectric fan 101 includes: a vibrating plate 199; piezoelectric elements 112, 122, 132, 142; flat plates 113, 123, 133, 143; and a fixing member 190. The fixing member 190 is stuck on a center of the vibrating plate 199. The vibrating plate 199 includes blades 111, 121, 131, 141 that make one end fixed to the fixing member 190 as a fixed end and the other end as a free end. In addition, each of vibration parts 114, 124, 134, 144 is composed by each of the blades 111, 121, 131, 141 and each of the flat plates 113, 123, 133, 143. The vibration parts 114, 124, 134, 144 are disposed radially to adjoin by an interval of angle π/2 around a center of the vibrating plate 199.