To provide an excellent ornithopter having an excellent power transmission efficiency and capable of performing an alert and highly maneuvarable flight by performing a flapping motion with a high flapping frequency since a large output can be provided by rotatingly driving a rotary motor at high speeds without requiring a complicated and heavy drive control circuit device and the large output from the rotary motor is converted into a flapping motion without a large mechanical loss.

In this resonance ornithopter, a flapping blade forms a blade vibration system performing a compound resonance in two degree-of-freedom; flapping vibration and feathering vibration. A vibrating motor generating an inertia force in the circumferential direction by the flapping blade pivotally supported on a flapping vibration pivot shaft is supportedly installed. A flapping vibration torque and a feathering vibration torque can be provided by the inertia force generated by the vibrating motor.