Abstract: A weed cutter for cutting weeds and other vegetation from the floor of a body of water. The underwater weed cutter includes a generally closed housing having at a front opening in the housing behind which the cutting mechanism is located. The weeds and other vegetation to be cut enter the opening wherein they are exposed to a plurality of cutting blades, each cutting blade being rotatably attached to one of two cutting mechanisms. The cutting mechanisms are driven by an electric motor which is coupled to a plurality of sprockets forming a gear box. The cutting mechanisms are routed from the rear of the housing toward to the front near the centerline where they turn approximately 90 degrees in opposite directions and proceed parallel to the opening as the cutting blades attached thereto perform the cutting operation. Ingested weed and vegetation clippings and other debris are discharged from the housing at a rear opening.