According to one embodiment, a grass cutter includes: a mower deck (10) configured to house a rotating blade for mowing grass therein a blower (30) configured to convey the grass mowed by the rotating blade to a grass collection vessel a blower PTO transmission shaft (61) configured to be connected with the blower (30) a drive force low-speed transmitting passage (L) through which a drive force from a drive source (40) is transmitted at low speed a drive force high-speed transmitting passage (H) through which the drive force from the drive source (40) is transmitted at high speed and a blower PTO hydraulic clutch (62) configured to connect the blower PTO transmission shaft (61) with the drive force low-speed transmitting passage (L), connect the blower PTO transmission shaft (61) with the drive force high-speed transmitting passage (H), and shift the blower PTO transmission shaft (61) in a neutral state in which the blower PTO transmission shaft (61) is not connected with the drive force low-speed transmitting passage (L) and the drive force high-speed transmitting passage (H), characterized in that the grass cutter further includes a brake mechanism (B) configured to abut against a brake member (53) installed at a non-rotation unit (51) to brake the blower PTO transmission shaft (61) when the blower PTO hydraulic clutch (62) is in the neutral state.
