PROBLEM TO BE SOLVED: To provide a chemical sprayer capable of easily avoiding deterioration of work efficiency. SOLUTION: A driving unit 14 has a cabin 3 which is mounted and supported on an airframe frame 13, and a driver's seat 51 which is located inside the cabin 3 and in which an operator can sit. Are arranged behind the front end of the cabin 3, and the cabin 3 has left and right front frames 31 located at the front of the cabin 3 and left and right rear of the left and right front frames 31. The rear frame 32 has a rear frame 32, the front frame 31 extends in the vertical direction of the airframe, and the rear frame 32 has a first portion 32a extending downward from the upper end portion of the cabin 3 and a first portion. It has a second portion 32b extending forward from the lower end portion of the 32a and a third portion 32c extending downward from the front end portion of the second portion 32b. [Selection diagram] Fig. 5【課題】作業効率の悪化を回避しやすい薬剤散布機を提供する。【解決手段】運転部１４は、機体フレーム１３に載置支持されるキャビン３と、キャビン３の内側に位置すると共に作業者が着座可能な運転座席５１と、を有しており、薬剤タンク１５は、キャビン３の前端よりも後側に配置されており、キャビン３は、キャビン３の前部に位置する左右の前部フレーム３１と、左右の前部フレーム３１よりも後側に位置する左右の後部フレーム３２と、を有しており、前部フレーム３１は、機体上下方向に延びており、後部フレーム３２は、キャビン３の上端部から下側へ延びる第１部位３２ａと、第１部位３２ａの下端部から前側へ延びる第２部位３２ｂと、第２部位３２ｂの前端部から下側へ延びる第３部位３２ｃと、を有している。【選択図】図５
