According to one embodiment, A grass cutter comprises 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 and a blower PTO transmission shaft (61) configured to be connected with the blower (30), wherein the grass cutter further includes 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 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) a mower PTO transmission shaft (71) configured to transmit the drive force to the rotating blade in the mower deck (10) a mower PTO hydraulic clutch (72) configured to switch transmission and interruption of the drive force to the mower PTO transmission shaft (71) a drive force transmitting gear (81) configured to transmit the drive force from the drive source (40) the mower PTO transmission shaft (71) transmits the drive force from the drive source (40), the drive force being transmitted via the drive force transmitting gear (81), when a mower PTO hydraulic clutch (72) is connected and the blower PTO transmission shaft (61) transmits the drive force from the intermediate shaft (80).
