To eliminate the needs for a rower to row a boat or the like with his/her back facing its stem and to perform wasted repetitive motion of returning oars after pulling them through water; and to solve disadvantages including that the rower must row the boat with all his/her strength while bracing his/her feet and that the rower must pay attention to his/her oars while rowing not to hit an oar of an adjacent boat.

Using a forward-speed rotary oar 7 allows the rower to row the boat while facing forward to the stem, and its vertically rotating structure takes up little widthwise space and eliminates the wasted repetitive motion. As the oar rotates, six flipper plates built in a balance wheel plate take in, push, and pump out water to make strokes in succession, resulting in easy rowing, thereby solving problems such as the need for the rower to row the boat with all his/her strength while bracing his/her feet and the need for the rower to pay attention to the oars while rowing not to hit an oar of the adjacent boat.