A shutter unit includes a base plate, a first blade operation member movable integrally with the first blade member between a first movement completion position and a first movement start position, a second blade operation member movable integrally with the second blade member between a second movement completion position and a second movement start position, a first charge member configured to charge the first blade operation member from the first movement completion position to the first movement start position, and a second charge member configured to charge the second blade operation member from the second movement completion position to the second movement start position, wherein the first charge member and the second charge member include coaxially arranged cam gears and are configured to rotate in opposite directions.