The Didier Pti'tAvion () is a French ultralight aircraft that was designed and produced by Didier ULM of Francheval. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft.
The aircraft was designed to comply with the Fédération Aéronautique Internationale microlight rules. It features a strut-braced high-wing a two-seats-in-side-by-side configuration enclosed cockpit, fixed tricycle landing gear and a single engine in tractor configuration.
The aircraft is made predominantly from welded steel tubing, with its flying surfaces covered in doped aircraft fabric. Its span wing, has an area of and it constructed using a welded steel tube lattice spar, aluminium tube ribs and a laminate leading edge. The standard engine is the Rotax 912UL four-stroke powerplant. The cockpit is wide and is intended to accommodate "bulky crew".
The aircraft comes with its own open-frame trailer for ground transport.