To provide a solid-liquid separating apparatus in which solid-liquid separating operation can be performed easily in high efficiency, which has excellent transportability and shelf life and the cleaning work of which can be carried out easily.

This solid-liquid separating apparatus is provided with a drum 2 having a filter 3 for capturing a solid, a motor 13 for rotating the drum 2, a drainpipe 6 for discharging the clear water obtained by removing the solid by the filter 3 from the inside of the drum 2 to the outside and a decompressing means for decompressing the inside of the drum 2.