ABSTRACT Professionalism of hiperbaric oxigen treatment in chamber at Drs. Med. R. Riyadi S, Phys Indonesian Naval Medical Institution (Lakesla) Surabaya is multifactorial, including attendant personnel building. Conclusion : A good attendant personnel building influences treatment in chamber. Improvement of facility developing and personnel building are necessary. Additional for further study with more sample and time for investigation. Key words : , high pressure compartement/ chamber, personnel building, attendant