Abstract: A plurality of sets of an excavating vessel and an associated soil discharging plate are mounted on an endless rotary member in an excavator in such a manner that said excavating vessel goes behind said associated soil discharging plate and the free end of said associated soil discharging plate is placed well into said excavating vessel so that said free end can discharge the soil excavated and contained in said excavating vessel at a predetermined position and, thus, the excavation and soil discharging works can be performed in a continuous and synchronized fashion.