The present invention relates to a sludge discharging apparatus for a settling pond, the apparatus including a flat bottom surface, an outlet at a side thereof, and a sludge collector for pushing settled sludge toward an end portion of the settling pond close to the outlet for collection while moving on the bottom of the pond. The apparatus of the present invention comprises a sludge moving portion disposed at an end portion of the settling pond to induce the sludge to move toward the outlet by spraying pressurized water on the sludge collected by the sludge collector, and a sludge guiding portion installed at an end portion of the settling pond to guide the sludge moved toward the outlet through the sludge moving portion to be discharged through an entrance of the outlet.; According to the present invention, the pressurized water sprayed at the sludge moving portion induces the sludge to move toward the outlet of the settling pond when the sludge is collected on a bottom surface of the settling pond by the sludge collector. Here, the sludge that is moved is guided to move toward the entrance of the outlet by the sludge guiding portion, and thus sludge discharge may be made easier and more accurate.