PROBLEM TO BE SOLVED: To solve a problem that failure of evaporation of urea water solution or deterioration of urea water solution is caused by heat radiation of an engine.SOLUTION: An exhaust device 12 discharging exhaust gas of an engine 11 mounted on a machine body frame 1 to outside of the machine body is configured by connecting an exhaust emission control device 15 to an exhaust pipe 14 connected to an exhaust manifold 13 of the engine 11. The exhaust emission control device 15 includes at least a DOC 16 and SCR 17. A urea water solution tank 18 is arranged in a front part of a lower space 22A formed in a machine body front part with respect to the engine 11 and SCR 17 and in a lower part of a step floor 21 of a steering part 6. A supply port 23 of urea water solution arranged in the urea water solution tank 18 is arranged in a portion close to the front of an opening 22 opening a right side face of the lower space 22A. Space capable of inserting an operator's toe thereinto is formed in a portion on a rear side of the supply port 23 in the opening 22 in a combine.SELECTED DRAWING: Figure 2【課題】エンジンの放熱により尿素水溶液の蒸発、あるいは、尿素水溶液の劣化という不具合が生じる。【解決手段】機体フレーム１上に搭載されたエンジン１１の排気ガスを機外に排出する排気装置１２を、エンジン１１の排気マニホールド１３に接続した排気管１４に排気浄化装置１５を接続した構成とし、該排気浄化装置１５は少なくともＤＯＣ１６とＳＣＲ１７とを有し、尿素水溶液タンク１８は、エンジン１１およびＳＣＲ１７よりも機体前方であって、前記操縦部６のステップフロア２１の下方に形成した下方空間２２Ａの前部に配置すると共に、前記尿素水溶液タンク１８に設けた尿素水溶液の給水口２３を、前記下方空間２２Ａの右側面を開放する開口部２２の前寄りの部位に配置し、前記開口部２２における前記給水口２３の後側の部位にオペレータのつま先を挿入できる空間を形成したことを特徴とするコンバイン。【選択図】図２
