To provide a screen that can very efficiently screen even a fine material without any loss due to diffusion into the air and can grind granular particles contained in an object simultaneously with screening the objective, and has excellent durability because of resistance to the widening of the openings of the screen material.

This pendulum screen 1 is the one wherein a basket 8 made of a screen material 3 is swingable about a specified axial line in the forward and backward directions within the scope of a specified angle. A particle grinding means (roller 6) for grinding granular particles contained in the object is enclosed in the basket 8 and the particle grinding means is swingable in the basket 8, and the distance from the base point of swing is variable with the thickness of the layer of the object introduced into the basket 8.