PROBLEM TO BE SOLVED: To provide a grass mower capable of stopping a blower PTO transmission shaft at a neutral time of a hydraulic clutch.SOLUTION: A blower PTO hydraulic clutch (62) comprises: a low-speed side clutch (66) connected to the side of a low-speed power transmission passage (L) and a high-speed side clutch (67) connected to the side of a high-speed power transmission passage (H). A brake mechanism (53) is a brake member for pressure-contacting brake pads (68f, 69f) with the low-speed side clutch (66) and the high-speed side clutch (67), respectively, and is interposed between the low-speed side clutch (66) and the high-speed side clutch (67).SELECTED DRAWING: Figure 3