To provide a riding type lawn mower that can simply and easily be attached to or detached from the body of the mower.

The mower 43 is arranged between the front left and right wheels 2, 2 and the rear left and right wheels, a rotation fulcrum is set on the mower body, and the front and rear link arms 51F, 51R are linked in one body via the fulcrum with each other and hung down. One of the front and the rear link arms is rotatably linked through the link holder tool 60, 64 to the brackets 57F, 57R on the mower 43 side in the horizontal direction, and in the other link arm the supporting shaft portion arranged in its lower end side is connected to the fulcrum receiving groove 63R having an opening part 62R formed on the bracket 57R on the side of mower 43 to be turnably connected around a horizontal axis. When the link and holding tool of the link arm 51F of the one link arm is released, the support shaft part of the other link arm 51R is released and the supporting shaft is unhinged from the opening part 62R.

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