PURPOSE: To reduce the thickness of a reinforcing part or the width of a lattice of a pattern to reduce a storage space of a shutter plate by forming the reinforcing part in a light shielding part consisting of a light metal with a heavy and high-strength metal.

CONSTITUTION: A sector 1 for a lens shutter has a shaft hole 1a as a fulcrum and another long groove 1b, and a reinforcing part 1d consisting of relatively high-strength materials is stuck to a light shielding part 1c, which consists of light-metal thin plate materials, in a form of a film. The reinforcing part 1d is stuck to the light shielding part 1c by vapor-deposition or the like and is formed into a prescribed pattern with a photoresist or the like. The reinforcing part 1d consists of iron or the like; and though the center of gravity of the sector 1 is nearer to the shaft hole 1a because iron has a specific gravity higher than that of, for example, titanium of the light shielding part 1c, the driving efficiency is improved.