Authors try to develop leveling equipments for rubble mounds such as for caissons. This paper descrides a model equipment developed for his purpose in our laboratory showing some experimental results.
　The leveling equipment we developed has a exciter at the lower part of it, which holds a pair of eccentric weights rotating contrary each other, evetually causing the leveling equipment to a complex pendlum motion.
　Leveling works should be carried out by hanging the equipment and moving it horizontally. Stones are moved by leveling shoes attached to the bottom of the equipment. The model is rather small for experiments.
　On the mound of stones each of 5～10kg, leveling chould be accompleshed under the conditions of 10m/min leveling velocity, 1m leveling width and 0.1m leveling depth, but on the 20～40kg stones, lower leveling velocity was needed.
　For this type of leveling equipments, it seems effective to rise the frequency of the exciter, because more powerful exciting force reduces rotation of the equipment caused by non-unifocm leveling force and better performance chould be expected.