Disclosed herein is a sliding module of a sliding-type portable terminal which includes a sliding guide; a slider adapted to slide on the sliding guide; at least one guide rod extending along a longitudinal direction and coupled to the sliding guide, while being fixed to the slider, in such a manner that it can slide; and a guide rib extending along the longitudinal direction and interposed between the sliding guide and the guide rod. The sliding module has the guide rib positioned between the slider and the guide rod of the sliding guide so that many components, including the guide rod and dampers, are not exposed. Therefore, damage to and contamination of the sliding module is prevented. The aesthetic appearance of the terminal is improved by not exposing the components of the sliding module are not exposed to the exterior of the terminal.