PROBLEM TO BE SOLVED: To provide a lawn mower in which turf grass is hard to be jammed in a grass collection path when sucking and collecting the turf grass.SOLUTION: The device body 11 includes: a suction port 20 for sucking the turf grass a discharge port 24 for discharging the sucked turf grass from the device body 11 a suction mechanism 22 for generating suction wind for guiding the turf grass from the suction port 20 to the discharge port 24 and a middle path member 26 for communicating the discharge port 24 with a grass collection port 42 formed in a grass collection box 41, and forming part of the grass collection path 23, 25 from the discharge port 24 to the grass collection port 42. The grass collection box 41 can be detachably attached to the middle path member 26. Further, the middle path member 26 is rotatably provided on the device body 11. Further, the effective area of the grass collection path 23 at a location to be connected with the discharge port 24 in the middle path member 26 is not changed wherever the rotation position of the middle path member 26 exists in the device body 11.
