PROBLEM TO BE SOLVED: To increase air capacity to carrier air created by a blade unit, and thereby mowed grass can smoothly be conveyed even in a flow path from a discharging cover to a conveying duct.SOLUTION: A mower unit includes: a blade unit 70 having a blade rotating around a first shaft core 71 and a second shaft core 72 a blade housing 21 forming a mowed grass discharge port 29 for discharging mowed grass between the first shaft core and the second shaft core, and forming a mowing space 8 by a top plate and side plates and a discharging cover 27 for forming a discharge/conveyance flow path 90 coming into communication with the mowing space 8 through the mowed grass discharge port 29. An intake part 2 is opened to a mowed grass discharging space 9 comprising a mowed grass discharging front area Z2 being an area of the mowing space 8 upper from a mowing plane 75 between the first shaft core 71 and the second shaft core 72 and defined by a blade rotation locus, and a mowed grass discharging rear area Z3 being an area in the vicinity of the mowed grass discharge port 29 in the discharge/conveyance flow path 90.
