Blade open-close device

A blade open-close device, comprising:

• an elongated member having an opening on an optical axis of an optical unit and extending in an intersecting direction intersecting with an optical axis direction in which the optical axis of the optical unit extends;
• a blade movable in the intersecting direction, the blade being configured to cover or uncover the opening;
• a drive configured to move the blade to one of a closing position to cover the opening or an opening position to uncover the opening;
• a transmission member configured to transmit a driving force generated by the drive to the blade;
• a body in which the elongated member, the blade, the drive, and the transmission member are located;
• and
• a restrictor configured to restrict movement of the blade in the intersecting direction,
• wherein the elongated member and the transmission member are located between the body and the blade in the optical axis direction,
• the body has a facing surface facing the elongated member and the transmission member, and
• the restrictor is located on the facing surface.