PURPOSE: A grounding structure of head drum apparatus is provided to reduce a producing cost and to improve a working efficiency by simplifying a composition for grounding and reducing a number of processes and to improve a grounding function by appropriately doing a tension of a grounding member in a using for a long time. CONSTITUTION: In a grounding structure of head drum apparatus, a plate-shaped grounding piece(70) formed at least one grounding portions having a wing shape in a fixing shaft(2A) between a upper bearing(7A) and a boss(42A) is installed. A ring portion of the plate-shaped grounding piece(70) is compressed with a certain force by a circular pressing portion of the boss(42A). An end of the wing-shaped grounding portion formed in a girth of the ring portion is maintained a state contacted an embossing projection on a upper face of an outer wheel of a bearing with a certain tension. Thereby a static electricity generated from a upper drum(1A) is removed effectively. And the grounding operation is improved by minimizing a rubbing resistance because the embossing projection formed in the wing-shaped grounding portion is contacted on the upper face of the outer wheel of the bearing(6A).
