Sieve (10) of a fiber web machine, which has a shaft (12) to be rotated and a sieve drum (15) which is arranged around it at a distance, and an inner surface which is arranged in the space between the shaft (12) and the sieve drum (15) the screen drum (15) comprises scraper blade (24) in contact to keep the inner surface of the screen drum (15) clean, characterized in that the scraper blade (24) is spring-loaded on the shaft (12) to be rotated by means of a spring (22) is fixed, and that the scraper blade (24) comprises an acute-angled cleaning edge (25) which is in contact with the inner surface of the screening drum (15).
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