A vessel includes a vessel body, an engine, a propulsion device, a drive shaft, a partition wall, a bearing, an elastic member, an outer housing, and a positioning member. The drive shaft transmits a driving force of the engine to the propulsion device, and the propulsion device generates a thrust by the driving force. The drive shaft is inserted into an insertion hole of the partition wall. The bearing rotatably supports the drive shaft. The elastic member supports the bearing. The outer housing supports the elastic member, and is fixed to the partition wall. The positioning member positions the elastic member with respect to the bearing and the outer housing by pressing the elastic member.