Abstract: Disclosed is a top bracing for a marine engine. The top bracing comprises a beam part for transmitting vibration load of the engine to a hull structure; a hull connection part for connecting the beam part to the hull structure; and an engine connection part for connecting the engine to the beam part. One of either the hull connection part or the engine connection part includes a pair of pressing plates connected to the beam part and arranged parallel to each other with a predetermined distance therebetween, a pair of friction support brackets fastened to the hull structure or the engine such that they are close to outer surfaces of the pair of pressing plates, respectively, and an elastic member intervened between the pair of pressing plates for damping the vibration load of the engine by adjusting pressing force which is applied by the pair of pressing plates to the pair of friction support brackets.