ROTATION DEVICE, OPTICAL SCANNING DEVICE, AND IMAGE DISPLAY DEVICE

A rotating apparatus includes a folded back elastically deformable portion including a first piezoelectric element 20 for deforming a first elastically deformable portion 12 and a second piezoelectric element 21 for deforming a second elastically deformable portion 13, and the rotating apparatus rotates a movable portion around a predetermined rotation axis, by respectively applying a first driving voltage signal Va and a second driving voltage signal Vb that are different from each other to the first piezoelectric element and the second piezoelectric element, to deform the first elastically deformable portion and the second elastically deformable portion; wherein a connection position 113 and a connection position 116 have a relationship of being relatively the same positions or a relationship of being symmetrical positions across all of the folded back structures, the connection position 113 being a position where a signal line 111 of the first driving voltage signal Va and the first piezoelectric element are connected in the first piezoelectric element, and the connection position 116 being a position where a signal line 115 of the second driving voltage signal Vb and the second piezoelectric element are connected in the second piezoelectric element.