To provide a separator which separates granular materials from the mixed state of the granular materials and powdery materials and which especially and efficiently separates and removes particulate materials and powdery materials adhering to the granular materials by moisture or static electricity.

The separator has a structure consisting of an outer layer cylinder 1 and an inner layer cylinder 2. An exhausting port 7 to discharge gases and particulate materials 14 is provided in the upper part of the inner layer cylinder, and an output port 9 to take out granular materials 12 to be separated is provided in the lower part. A cylindrical part 3 does not have a hole, but many holes 5 to pass powdery materials 13 are provided only at a conical shape part 4.