Patent ID: 8454899

Claim:
A gas reforming device comprising: a flow passage forming body in which a flow passage through which process gas flows is formed; a cathode provided on a cross section of said flow passage; a first anode that is provided apart from said cathode, and includes a bar-like portion; and a pulse power supply that applies a pulse voltage to between said cathode and said first anode, wherein said cathode includes: an opening array body having a planar structure in which openings through which the process gas passes are arrayed, wherein the entirety of said opening array body is made of an insulator and said opening array body has a surface made of an insulator; and a grounding electrode provided on a peripheral portion of said flow passage, wherein said grounding electrode is in contact with only a peripheral portion of said surface of said opening array body, a tip end of said bar-like portion of said first anode is located in an inside of said flow passage, and is spaced apart from said opening array body in a direction parallel to a direction where the process gas flows, and said grounding electrode is provided at a position of contacting an end portion of an ion sheath layer spread on the surface of said opening array body by the application of the pulse voltage to between said cathode and said anode.