Abstract: Device for posting bills by unwinding a fabric (300) carrying information, in which the fabric (300) is wound and unwound around two motorized and synchronized rollers (100, 200) in such a way that the fabric (300) is kept under tension as it is unwound, characterized in that: the top end (310) of the fabric (300) is mounted removably on a fixing module (110) secured to the upper roller (100); the fixing module (110) is connected to the upper roller (100) by an unwinding mechanism (400) allowing the fixing module (110) to be moved down close to the lower roller for fitting and removing the top end (310) of the fabric (300); it comprises means (500, 501, 340) for keeping the fabric under transverse tension.