A boat includes a recess arranged in a middle, as viewed in a horizontal direction, of a stern, and outboard motors installed on an installation portion provided in the recess such that the boat driven by the outboard motors. A transom platform is located at left, right, and front sides of the recess so that a crew is allowed to walk on the transom platform. A rear portion of each of the left portion and the right portion of the transom platform projects rearward beyond the outboard motors. The starboard-side step of the transom platform has a step, while the port-side step has a step. A storage portion is arranged below the fore step, and a storage portion is arranged in a rear portion of the port-side step. The boat allows for an effectively usable large space to be provided in the boat body and allows for easy movement around the outboard motors.