PROBLEM TO BE SOLVED: To provide a self-propelled pest control machine which effectively utilizes a space in a cabin and secures the sealability of the cabin when a recessed part is provided at a chemical tank and a seat is disposed at the recessed part.SOLUTION: A self-propelled pest control machine includes: a machine body frame 4 which forms a vehicle body and extends in a longitudinal direction a chemical tank 8 provided on the machine body frame 4, the chemical tank 8 where a recessed part which opens forward and upward is formed as a chemical tank side recessed part 8b a seat 31 disposed at the chemical tank side recessed part 8b and a cabin which is provided on the machine body frame 4 so as to be located adjacent to a front side portion of the chemical tank 8 and stores the seat 31. The cabin includes a partition wall 29 closing a portion of the cabin which faces the chemical tank 8. The partition wall 29 has a recessed part, which is stored in the chemical tank side recessed part 8b and is recessed so as to store the seat 31, as a partition wall side recessed part 29a.COPYRIGHT: (C)2014,JPO&INPIT【課題】薬剤タンクに凹部を設け、この凹部に座席を配置した場合に、キャビン内の空間の有効利用を図りつつ、キャビンの密封性を確保できる自走式防除機を提供する。【解決手段】自走式防除機は、車体を構成し、前後方向に延びる機体フレーム4と、機体フレーム4上に設けられ、前方及び上方へ開放された形状の凹部が薬剤タンク側凹部8bとして形成された薬剤タンク8と、薬剤タンク側凹部8bに配置される座席31と、機体フレーム4上及び薬剤タンク8の前側の部分に隣接して設けられ、座席31を収容するキャビンと、を備える自走式防除機であって、キャビンは、薬剤タンク8に対向する部分を塞ぐ仕切り壁29を備え、仕切り壁29は、薬剤タンク側凹部8bに収容されると共に座席31を収容するように凹む凹部を仕切り壁側凹部29aとして有する。【選択図】図5