An unmanned aerial vehicle includes a housing, a wireless communication circuit, a navigation circuit, a plurality of propulsion systems, and a propeller. At least one of the plurality of propulsion systems includes a motor, and a construction disposed to the motor. The construction includes a first side, a second side facing the motor in a direction opposite to the first side, a shaft inserting hole disposed to the second side, and a latching protrusion and a latching groove that are extended sequentially inside the shaft inserting hole. The propeller is fastened to the construction, and includes a hub coupled to the first side of the construction, a fixing shaft that protrudes in a direction of the construction that is inserted to the shaft inserting hole of the construction, and at least one protrusion on an outer circumferential surface of the fixing shaft.