To provide a safety device for a radio-controlled model flying object and the radio-controlled model flying object which does not fall even it is made uncontrollable by electronic interference and has excellent economical efficiency and safety.

The outer shape of this radio-controlled model flying object is formed into the shape of an airplane 4, and a storage area storing a falling speed reducing means 43 is provided in the cockpit of the airplane 4. If a safety protective switch is pushed when the airplane 4 becomes uncontrollable, the upper cover 40 of the cockpit is opened, the falling speed reducing means 43 is protruded together with a weight 45 connected to it by a connecting line 42, and the airplane 4 can safely land.