To provide a riding type lawn mower in which a ROPS can be mounted as appropriate on a riding type lawn mower with high dump specifications or low dump specifications, thereby enhancing safety. A riding type lawn mower is provided with a mower 1 between a front wheel 32 and a rear wheel 23, a collector 5 behind the mower 1, support frames 7 for the collector 5, a ROPS support frame 54 provided on the upper part of the collector support frames 7, and having the width wider than the distance between the right and left collector support frames 7, a ROPS frame 52 formed in a U-shape having an opening on the lower part, and coupled at each of lower end parts thereof to right and left upper parts of the ROPS support frame 54, an arm 10 provided to protrude to the front upper end of the collector 5 to be coupled to the coupling frame 50, which couples the right and left collector support frames 7, so as to be able to turn, and a dump cylinder 8 located between the arm 10 and the vehicle body frame 2, and turning the rear part of the collector 5 upward with the coupling frame 50 as a supporting point. The right and left collector support frames 7 are utilized to form a ROPS 9, so that it is possible to achieve a reasonable arrangement with a simple structure.
