PROBLEM TO BE SOLVED: To provide an imaging device that causes bounds of a movable mirror to be quickly converged, and contributes to miniaturization or reduction in cost.SOLUTION: A movable mirror impact absorption mechanism has: a main mirror that is rotationally movable between a finder light guide position and a retreat position; a sub-mirror that rotates in response to rotation of the main mirror, and reflects a light flux transmitting the main mirror at a reflection position; a stopper that abuts against a position regulation part of the main mirror to determine the finder light guide position; a sub-mirror stopper that abuts against a position regulation part of the sub-mirror to determine the reflection position; and shaft position displacement means that displaces a rotary shaft of the main mirror in a direction contacting with and separating from the stopper, in which at least one of the main mirror and the sub-mirror has a preceding abutting part by which the abutting against respective stoppers will be preceded before respective position regulation parts abut against respective stoppers, and after abutting against the stopper, the preceding abutting part is configured to displace a relative position with respect to the stopper accompanied by the shaft position displacement of the main mirror.SELECTED DRAWING: Figure 6
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