NOVELTY - A mixed gas supply apparatus includes fuel gas supply portion, odorization agent addition material storage portion (130), mixing chamber (110), fuel gas supply path, odorization agent addition material supply path (120), and odorization agent addition material processing portion. The fuel gas and odorization agent (14) are mixed in the mixing chamber. The odorization agent addition material processing portion adds odorization agent to the fuel gas by heating the odorization agent addition material (10) supplied to mixing chamber.    USE - Apparatus is used for supplying mixed gas and used in fuel cell system (both claimed).    ADVANTAGE - The mixed gas supply apparatus is efficiently supplies mixed by easily mixing fuel gas and odorization agent even at low temperature conditions.    DETAILED DESCRIPTION - A mixed gas supply apparatus supplies a mixed gas formed by mixing fuel gas and odorization agent. The mixed gas supply apparatus is provided with a fuel gas supply portion for supplying fuel gas, an odorization agent addition material storage portion, a mixing chamber, a fuel gas supply path, an odorization agent addition material supply path, and an odorization agent addition material processing portion. The odorization agent addition material storage portion stores the odorization agent addition material which is used to add odorization agent to fuel gas-containing odorization agent. The fuel gas and odorization agent are mixed in the mixing chamber, and the fuel gas supply path supplies fuel gas from the fuel gas supply portion to the mixing chamber. The odorization agent addition material supply path supplies the odorization agent addition material from its storage portion to the mixing chamber. The odorization agent addition material processing portion adds odorization agent to the fuel gas which is supplied to mixing chamber by heating the odorization addition material supplied to the mixing chamber.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic structural view of fuel cell system equipped with mixed gas supply apparatus. (Drawing includes non-English language text)    Odorization agent addition material (10)    Coating layer (12)    Odorization agent (14)    Mixed gas supply portion (100)    Mixing chamber (110)    Odorization agent addition material supply path (120)    Odorization agent addition material storage portion (130)