To provide a lens blade driving device which couples a blade drive unit with a lens frame to integrally move the lens frame and the blade drive unit, and which prevents a flexible wiring board for supplying power to the blade drive unit from interfering with the movement of the lens frame.SOLUTION: A lens blade driving device comprises: a lens fame for holding a lens; a blade drive unit integrally coupled with the lens frame and configured to drive blades for controlling light transmitting through the lens; and a base member configured to support the blade drive unit in a manner that allows the blade drive unit to move along an optical axis of the lens. A flexible wiring board having one end connected to the blade drive unit is laid to overlap the blade drive unit. A portion of the flexible wiring board overlapping the blade drive unit includes an excess portion.SELECTED DRAWING: Figure 1
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