A swinging and tilting mechanism includes a lens, a lens holding frame that holds the lens, a fixed member, and an operation member. The fixed member includes a rotation support portion that rotatably supports the lens holding frame in at least one side surface in one direction perpendicular to an optical axis of an optical system, and a tilting support portion that supports the lens holding frame tiltably in a direction of the optical axis in at least one side surface in another direction perpendicular to the optical axis and the one direction. The operation member rotates the lens holding frame supported by the fixed member with the rotation support portion used as a support point, and tilts the same along the tilting support portion.