An imaging device includes a guiding device which guides at least one radially-retractable optical element, serving as part of a photographing optical system, along a guide direction between a photographing position on a common optical axis of the photographing optical system and a radially-retracted position away from the common optical axis in a plane orthogonal to the common optical axis; a detector for detecting a direction and a magnitude of vibration applied to the photographing optical system; and a common actuator for moving the radially-retractable optical element along the guide direction to counteract the vibration in accordance with an output of the detector when the radially-retractable optical element is in the photographing position, and for moving the radially-retractable optical element along the guide direction between the photographing position and the radially-retracted position.