An isolating device for isolating objects, in particular fuel pellets, contains a conveying device having a conveying belt with a conveying side and a backing side and is guided over at least two deflection pulleys and on which a number of pushing elements protruding from the conveying side of the conveying belt are arranged. The isolating device is configured for a particularly reliable and interruption-free isolation at a high processing speed. Each pushing element is connected with a directing element arranged on the backing side. The directing element includes a sliding surface facing away from the conveying belt. The conveying device contains a guide rail having a guiding surface for the directing elements arranged in a partial section of the conveying belt lying between the deflection pulleys. The sliding surface and the guiding surface are of a complementary shape so that the sliding surface can slide on the guiding surface.