To improve the light shielding property of a shutter for camera having three or more movable blades.

In the focal-plane shutter equipped with a slit forming blade 9 and an auxiliary blade 13 supported by plural actuation arms 3 and 5 so that they can perform a parallel link motion, and plural covering blades 15 to 18, the 2nd movable blade (1st covering blade) 15 is partially superposed under the specified movable blade (auxiliary blade) 13 and the 3rd movable blade (2nd covering blade) 16 is partially superposed under the blade 15 and also partially superposed under the blade 13. The blades 13, 15 and 16 are successively abut on each other at the superposed parts but a gap is formed within a range where the blade 15 is retreated on the opposed surfaces of the blades 13 and 16, so that the light shielding property is spoiled. By providing the projecting part 16a for shielding light on either of the movable blades whose opposed surfaces form the gap, the gap is shut and light is prevented from being leaked.