A reversibly mountable clutch control handle for a walk-behind lawn mower which may be pivotally mounted on the collapsible handle of the lawn mower in either one of two alternative mounting positions, whichever best suits the convenience and comfort of the operator, and in which the mower handle, the clutch control handle, and the control linkage associated with the clutch control handle are all collapsible to a folded position for storage or shipment in either of the mounting positions of the clutch control handle. The mower handle includes two laterally spaced legs lying in a common plane and connected at their upper end by a cross bar. In one of its alternative mounting arrangements, the clutch control handle when in its unclutched position lies above and forwardly of the common plane of the laterally spaced legs of the mower handle, while in the other of its alternative mounting arrangements, the clutch control handle when in its unclutched position lies below and rearwardly of the aforementioned common plane. When the clutch control handle is "squeezed" by the operator toward the common plane of the mower handle legs, belt-driven drive rollers are moved into driving engagement with the rear drive wheels of the mower, and when the operator releases the clutch control handle, the belt-driven drive rollers are moved by the tension of the drive belt for the rollers out of driving engagement with the rear wheels of the mower.