Abstract: A gripe mechanism of a reservoir tank for a toilet bowl is assembled to a through hole defined in the reservoir tank. The gripe mechanism includes a bolt extending through the through hole of the reservoir tank, a position limit member locating at an inner side of the reservoir tank with the bolt extending therethrough, a positioning member, a lever, and a gripe. A plurality of positioning cutouts is evenly defined in the position limit member. A position limit frame extends from the position limit member. A screw hole is defined in the positioning member for engaging with the bolt. The gripe is connected to a projecting rod through a screw thereby linking the gripe to the lever. Movement of the lever is limited by the position limit frame of the position limit member.