To provide a light shielding screen which is simple in structure and safe when used at the time of strong wind.

The light shielding screen 10 is arranged on the outdoor side of an opening, which is constituted of a screen main body 40 which can be wound in to an upper portion of the opening, a bottom bar 41 attached to a lower end of the screen main body 40, and a hook 22 which engages with the bottom bar 41 at a lower portion of the opening. In the screen main body 40, discontinuous slits 43 are formed at a location in the vicinity of the bottom bar 41, in a width direction of the screen main body 40.