Recording medium processing apparatus and image forming system

The invention provides a recording medium processing device and an image forming system, which can suppress the reduction of the productivity of binding processing compared with the condition that the moving speed of teeth used for binding processing does not change. The recording medium processing apparatus includes: a first tooth used for binding processing of a recording medium bundle; a second tooth that moves toward the first tooth and presses the recording medium bundle located between the second tooth and the first tooth; and a moving member that includes a screw moving member that moves the second tooth with respect to the first tooth, the screw moving member moving the second tooth by rotating a screw that engages with an interlocking portion that interlocks with the second tooth in the circumferential direction. The moving speed of the second teeth moved by the moving member varies. 本公开的记录介质处理装置以及图像形成系统与用于装订处理的齿的移动速度不发生变化的情况相比，抑制装订处理的生产性的下降。记录介质处理装置包括：第一齿，被用于记录介质捆的装订处理；第二齿，朝向所述第一齿移动，对位于与所述第一齿之间的所述记录