PROBLEM TO BE SOLVED: To provide a hydrogen/oxygen supply device which inhibits condensation of water on a surface of a combustion burner to inhibit the occurence of rust and deterioration of the combustion efficiency during combustion of hydrogen.SOLUTION: A hydrogen/oxygen supply device includes: a main member having a first circular column part 10, a second circular column part 11, which is provided so as to extend from a part of an upper surface of the first circular column part to the upper side in a vertical direction, and a support part 12, the main member incorporating a first pipeline 13 communicating with an opening on an upper surface of the second circular column part and a second pipeline 14 communicating with an opening on the upper surface of the first circular column part； and a cover member having a cylindrical part 20 having a cylindrical part opening and a circular disk part 21 having a circular disk part opening 22. The circular disk part 21 is disposed so as not to contact with the second circular column part 11 and the first circular column part 10. The hydrogen/oxygen supply device supplies an oxygen containing gas through the first pipeline and supplies a hydrogen containing gas through the second pipeline. Forward tapered surfaces TP, in which a diameter is reduced toward the upper side in the vertical direction, are provided at a corner part located at the vertically upper side of the first circular column part and a corner part located at the vertically upper side of the circular disk part.SELECTED DRAWING: Figure 1【課題】水素の燃焼時において、燃焼バーナの表面への水の凝集を抑制して、錆の発生を抑制し、燃焼効率の低下を抑制する。【解決手段】第１円柱部１０と、第１円柱部の上面の一部から鉛直上方に伸びるように設けられた第２円柱部１１と、支持部１２とを有し、第２円柱部の上面の開口に連通する第１配管１３と、第１円柱部の上面の開口に連通する第２配管１４を内蔵する主部材と、円筒部開口を有する円筒部２０と、円板部開口２２を有する円板部２１とを有するカバー部材を有し、円板部２１が第２円柱部１１と第１円柱部１０と非接触となるように配置され、第１配管を通じて酸素含有ガスを供給し、第２配管を通じて水素含有ガスを供給し、第１円柱部の鉛直上方の角部と、円板部の鉛直上方の角部に、鉛直上方ほど径が小さくなる順テーパ面ＴＰが設けられている構成とする。【選択図】図１
