PROBLEM TO BE SOLVED: To obtain a frame structure suitable for supporting a prime mover part having a belt type continuously variable transmission.SOLUTION: A multipurpose work vehicle comprises a rear part frame 11 for supporting a prime mover part 2, and a main frame 10. The prime mover part 2 comprises an engine 27, a transmission 28, and a belt type continuously variable transmission 29 located on their left side. The rear part frame 11 comprises front and rear support members 24, 25 for supporting rear wheels. The rear side support member 25 has a vertical length from the rear part frame 11 to a rear frame part 10C of the main frame 10 and is located at the rear side of a vehicle body from the belt type continuously variable transmission 29, and an upper end part of the rear side support member is connected to the rear frame part 10C. The front side support member 24 has a vertical length shorter than that of the rear side support member 25 and is located at the vehicle body lateral outside of the belt type continuously variable transmission 29. A space S1 allowing attachment and detachment of a gear change cover 42 provided in the belt type continuously variable transmission 29 from the vehicle body lateral outside is formed between an upper end of the front side support member 24 and the rear frame part 10C.SELECTED DRAWING: Figure 8

【課題】ベルト式無段変速装置を備える原動部の支持に適したフレーム構造を得る。【解決手段】多目的作業車は、原動部２を支持する後部フレーム１１と、メインフレーム１０とを備え、原動部２は、エンジン２７と変速装置２８とそれらの左側に位置するベルト式無段変速装置２９とを備え、後部フレーム１１は、後輪支持用の前後の支持部材２４，２５を有し、後側支持部材２５は、後部フレーム１１から上方のメインフレーム１０の後フレーム部１０Ｃにわたる上下長さで、ベルト式無段変速装置２９よりも車体後側に位置して、その上端部を後フレーム部１０Ｃに連結し、前側支持部材２４は、後側支持部材２５よりも短い上下長さで、ベルト式無段変速装置２９の車体横外側に位置して、前側支持部材２４の上端と後フレーム部１０Ｃとの間に、ベルト式無段変速装置２９に備えた変速カバー４２の車体横外側からの着脱を許容する空間Ｓ１を形成している。【選択図】図８