The flying body includes a body (100a), a lift engine (102a1), and reaction control engines. The lift engine includes, a gas generator (200a1) for generating a turbine driving gas, a first thrust device (204a1, 208a1, 210a1) for providing a power by the turbine driving gas and exhausting a gas (20a1) in a predetermined direction to generate a first thrust force, a second thrust device (214a1, 218a1, 220a1) driven by the power to suck and compress a surrounding gas (21a1) and to accelerate and exhaust the surrounding gas substantially in a direction of a flow of the gas exhausted by the first thrust device to generate a second thrust force to be added to the first thrust force. The gas generator generates a gas by using a raw material (10, 11a) for gas generation carried by the flying body. The first thrust device has a turbine (204a1, 208a1) for obtaining a rotational force, and the second thrust device has a fan (214a1, 218a1) driven by the rotational force obtained by the turbine, and a nozzle (222a1) in a downstream of the fan.