PURPOSE: A sludge dehydrating device is provided to reduce energy consumption, and to reduce manufacturing cost with simplified structure of the device. CONSTITUTION: A sludge dehydrating device includes a washing water supply hose(120) installed at a bearing(15). The bearing is installed at a left wall(12) of a housing(10). The washing water supply hose passes through the housing of the bearing. The bearing supports each shafts. A plurality of penetration holes formed on a disk plate discharges washing water. The washing water is supplied from a washing water inlet(120a).
