| 摘要 |
[Problem] To provide a piezoelectric actuator which is free of disconnection even when a through-hole conductor of a flexible circuit board is arranged at a junction and which also realizes the downsizing of a piezoelectric actuator, and a piezoelectric vibration device, portable terminal, acoustic generator, acoustic generation device, and electronic device provided with the piezoelectric actuator. [Solution] A piezoelectric actuator (1) is provided with: a piezoelectric element (11) having a plate-shaped layered body (14) in which an internal electrode (12) and a piezoelectric layer (13) are stacked, and a surface electrode (15) electrically connected with the internal electrode (12) on one principal surface of the layered body (14); a flexible circuit board (2) having a wiring conductor (22) electrically connected with the surface electrode (15); and a conductive joining member (3) for electrically connecting the surface electrode (15) and the wiring conductor (22), the flexible circuit board (2) having a through-hole conductor (24) in an area in which the flexible circuit board (2) overlaps with the piezoelectric element (11), and an area for the junction of the flexible circuit board (2) and the piezoelectric element (11) by the conductive joining member (3) being provided at a position around the through-hole conductor (24) and set apart from the through-hole conductor (24) in a plan view. |
