To provide a recovering method of molding sand which improves the recovering efficiency of the molding sand so as to reduce the quantity of industrial wastes, and an apparatus therefor.

The molding sand for recovering, completing tentative crushing treatment is supplied into one pair of elastic rollers 9a, 9b having the setting gap S, and the insufficient crushed sand blocks 6 are crushed once more in the elastic rollers 9a, 9b. On the other hand, contained solid foreign matters 8 are passed through while burying on the surfaces of the elastic rollers 9a, 9b or passed through by push-expanding the gap S of the elastic rollers according to this size and thereafter, the reusable molding sand is separated with the other mixed material.