The present invention provides a camera system with an image blur prevention function, including: an interchangeable lens, a camera main body to which the interchangeable lens is detachably attached, a first switch which is disposed in the interchangeable lens and indicates execution of the image blur prevention function, a second switch which is disposed in the camera main body and indicates the execution of the image blur prevention function, and a controller which controls an on/off operation of the image blur prevention function of the camera system in accordance with at least one state of the first switch and the second switch.