An articulated riding mower comprised of a sulky unit pivotally connected to a walk-behind mower. To attach the sulky to the walk-behind mower, the mower deck includes a bridge support overlying the mower deck between the rear corner positions thereof. The bridge support has depending extensions at the corner positions mounted on the axle of the rear wheels. The depending extensions of the bridge support are, in turn, rigidly fastened to the respective corners of the mower deck. A central portion of the bridge support carries a pivotal connection including a bearing for removably attaching the sulky to the walk-behind mower. In a preferred embodiment, the handle of the walk-behind mower is connected, at its lower end, directly to the bridge support.