Reflector driving device

Provided is a miniaturized reflector drive device capable of improving the operating speed of a reflector. The reflector drive device includes: a reflector holding member capable of holding a reflector that reflects light; a swing member connected to the reflector holding member so that the reflector holding member can swing about a first axis; a fixed-side member connected to the swing member such that the swing member can swing about a second shaft having an axial direction perpendicular to the axial direction of the first shaft; a first drive unit that swings the reflector holding member about a first axis; and a second drive unit that swings the swing member about a second axis, the first drive unit including a first piezoelectric element extending in an axial direction of the first axis, the second drive unit including a second piezoelectric element extending in an axial direction of the second axis, and the second drive unit being configured to drive the swing member to swing about the second axis when