For providing a lift linkage with easy mounting operation, this invention provides a lifting link mechanism 7 which lifts a mower deck 6 comprising: a front bracket 71 attached to a front portion of the mower deck 6, a front link 72 coupled to the front bracket 71, a rear bracket 73 attached to a rear portion of the mower deck 6, and a rear link 74 coupled to the rear bracket 73, wherein a protrusion formed in the rear link 74 is fit into a notch portion of the rear bracket 73 and at least the rear link 74 is coupled in a rotatable manner about the protrusion.
