An anti-lofting deflector for landing gear having two wheels on an axle. The deflector comprises a stationary support (5) for being fastened in service to a portion of the landing gear that carries the axle in order to extend between the wheels and present a distal end behind the wheels. It also has a first flap (2) hinged to the support via its distal end about a first hinge axis (X1) substantially parallel to the axle and a second flap (3) hinged to the first flap about a second hinge axis (X2) substantially parallel to the first hinge axis. Finally, there is a a return member (11) arranged so as to urge the second flap against an abutment of the first flap that prevents the second flap from becoming aligned with the first flap, and to urge the first flap against an abutment of the stationary support that prevents the first flap from folding against the support.