PURPOSE: To perform the roll stabilization of a guidance airframe, by detecting the pressure difference of a stable wing being generated due to roll rotation, adjusting the amount of air being discharged to a stable wing surface, and generating lift in opposite direction so that the roll rotation can be canceled in opposing stable wings.

CONSTITUTION: When an airframe is flying while achieving roll rotation, pressures Pa and Pd increase and pressure Pb and Pc decrease and a pressure sensor 17 detects a pressure difference 2ΔP. When a pressure sensor 17 changes the pressure difference to an electrical signal and gives it to a flow-rate adjustment valve 12 as a command, the flow-rate adjustment valve 12 adjusts the amount of air flowing from a high-voltage air source 11 to a pipe so that a high-voltage air is discharged from discharge holes 14a and 14d. A high-voltage air being discharged from a discharge hole 14a releases the flow on the upper surface of a stable wing 5a and generates downward lift ΔL. Similarly, a high- voltage air being discharged from the discharge hole 14d releases the flow on the lower surface of the stable wing 5b and generates the upward lift ΔL. Roll moment being generated due to the lift ΔL in opposite directions each other suppresses a roll rotation.