Abstract: A structure of an exercising apparatus as a rowboat including mainly a housing and a base skeleton, the housing includes a handle, a drawing element, a pedaling portion, a display device, a sensor and a reeling axle. When the handle is drawn backwards to move, the drawing element is moved to leave the housing and to move the reeling axle, so that part of the drawing element having been reeled in is reeled off the reeling axle; when the drawing force is stopped, the reeling axle reels back automatically to reel back the drawing element to thereby restore the drawing element and the handle to their original positions. A user can pull the handle to and fro to simulate the action of rowing a boat. The functioning elements are received in the housing, the pedaling portion can be folded to be hidden in the bottoms of the two sides of the housing, the base skeleton can be extended and contracted, so that the effect of saving space after use and the effect of exercising can be obtained.