The present disclosure provides a hybrid suspension arm for a vehicle, having excellent durability. A hybrid suspension arm for a vehicle according to one embodiment of the present disclosure comprises: a suspension arm body which is made of metal material and comprises a top plate part and two sidewall parts extending downward from the top plate part to be open downward; and an insert molding which is made of plastic material and is formed by being insert-molded in the suspension arm body, wherein a thickness of at least a portion in the portion of the insert molding that comes in contact with the top plate part and the sidewall parts is in the range of 2 mm to 3 mm.