To fully separate molding sand from a casting in a short time and to shorten the length of a trough by constituting the main part of a casting guide body with a grating structural body, in case of shaking out a mold which is already cast and cooled and laid on this grate, and separating the molding sand from the casting.

The mold which is already cast and cooled, is laid on the grate. The trough is constituted with the grating structural bodies 2 horizontally fitting round bars and fixed to frames vertically stood, guide plates 3 for guiding the casting to an outlet in both sides of the grate and the grate. This trough is vibrated with a vibrator 8 and the laid mold which is already cast and cooled, is shaken out and separated into the casting and the molding sand, and the separated sand is dropped into a hopper 5. A belt conveyor is arranged at the lower part of the hopper 5 to carry out the molding sand to the outer part. The casting separating and removing the molding sand is carried to the outlet of the trough with the vibration and shifted to the following process. By this method, the miniaturization of the shake-out machine and the reduction of cost can be obtd.