PURPOSE: To provide a shaking-out device for molding sand, in which almost perfect shaking-out of the molding sand can be executed even in the case of a work having complicate shape.

CONSTITUTION: A work receiving jig 7 which can hold the work in the vertical posture, and a hammer device 14 hitting the surface of the work W from the horizontal direction are arranged on a frame 4 shaken in the right and left direction while centering the horizontal axis. The molding sand can almost perfectly be removed even from the inner part of the work W having the complicate shape because the molding sand in the work W is shaken out while shaking to the right and left direction.