PURPOSE: To improve a steering accuracy and fluttering resistance by eliminating looseness of rotation of steering wings in a guided missile in which the wings are operated to be mounted and removed in a short time.

CONSTITUTION: A guided missile has steering wings 2 to be operated to be mounted and removed in a short time, and comprises a hole side serration 7 at an output shaft 4 for outputting a rotary force of a steering driving mechanism 5, a shaft side serration 8 provided at a steering wing shaft 3, a piezoelectric element 10 fixed to a surface of the seviation 7 or 8, and a power source of the element 10 provided at a missile body. Accordingly, the wings can be mounted and removed in a short time, and simultaneously the element eliminates looseness of rotation of the wings to improve a steering accuracy and fluttering resistance.