A clutch-brake type roll blind in which a screen is rolled up by means of a spring, characterized in that a pulling cord need not be attached to a weight bar even in a case where the blind is installed on a window which extends from the floor to a portion close to the ceiling. A rotating shaft (14) rotating integrally with a roll (10) is made to protrude from one side of the roll (10) so as to be rotatably supported on one of brackets, and a pulley (22) capable of rotationally driving the roll (10) in a screen pulling-out direction is mounted on the rotating shaft (14) integrally or via a one-way clutch so as to rotate together with the rotating shaft. An operation cord member such as a ball chain (23) is set over the pulley, whereby the ball chain (23) is operated so as to roll up or down the screen (11).