A vertical engine type cultivator of the type that has an internal combustion engine on an upper side, a wheel shaft on a lower side and an operational handle on a rear side. The engine is formed such that the engine main body thereof is provided with a vertically directional crankshaft extending downwards through an oil case. A frame casing on the lower side of the oil case and a clutch mechanism interposed between the crankshaft and an output shaft disposed below the crankshaft is contained in the frame casing. An operational member for the clutch mechanism is provided on the oil case side.