To provide a gear processing tool polisher which can improve the homogeneity of the accuracy of a plurality of tool blades of a skiving gear processing tool, a gear processing tool polishing method and a gear processor having the gear processing tool polisher.SOLUTION: A control device of a gear processing tool polisher 20 comprises: a group decision part for performing processing for deciding a plurality of tool blades 2a for cutting one tooth as one group on the basis of the blade number of the tool blades 2a of a gear processing tool 2 and the tooth number of teeth of a gear to all the teeth; and a polish processing part for polishing blade side faces 2b of the tool blades 2a belonging to the group at each group which is not duplicated out of a plurality of the decided groups by a grind wheel 3.SELECTED DRAWING: Figure 1A
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