To extend the life of a shutter device.

A front curtain main arm 421 has a cylindrical supporting part 4210. The cylindrical supporting part 4210 is a portion formed to be cylindrical continuously from a thin plate that constitutes the front curtain main arm 421 so that a periphery edge portion of a circular opening of the thin plate that constitutes the front curtain main arm 421 is curved toward one side (front) in a thickness direction of the thin plate, and extends in a direction perpendicular to the thin plate that constitutes the front curtain main arm 421. By inserting a front curtain main arm supporting pin 181 through an inner peripheral surface of the cylindrical supporting part 4210 and by pivotally supporting the front curtain main arm 421 to be turnable, area contacting with an outer peripheral surface of the front curtain main arm supporting pin 181 can be increased in comparison with a case where the cylindrical supporting part 4210 is not provided.