In a cylindrical screen (1) of the invention, screen bars (2) are disposed in parallel with intervals therebetween, and the screen (1) has a cylindrical shape having a height larger than a diameter. The screen bars (2) adjacent to each other form longitudinal slits (5) therebetween and the screen bars are stopped by a ring (R). In the screen bars, the longitudinal slits (5) are divided in the middle, by a member (3) having a width (T) larger than a thickness (t) of the ring (R), in a direction transversely crossing the longitudinal direction of the screen bar (2). Instead of the slits being composed of screen bars, openings can also be formed in a cylindrical screen plate. Accordingly, in the cylindrical screen of the invention, a mat formed on the screen can be easily peeled off.