The invention provides an actuator device changed by a low driving voltage, a liquid ejecting head, and a liquid ejecting device. The actuator device is provided with piezoelectric elements mounted through vibration plates which is positioned on one side of a substrate and each including a lower electrode, a piezoelectric layer, and an upper electrode, wherein a ratio d31/S11E of a piezoelectric constant d31 of the piezoelectric layer to an elastic compliance S11E of the piezoelectric layer is greater than 5 C/m2, and the elastic compliance S11E of each vibration plate is greater than 2*10<-8>m2/N. |