The Yetti Air J-03 (or Yetti J-03) is a Czech ultralight aircraft designed and produced by Yetti Air in the Czech Republic.
The aircraft has a high-wing with a metal frame and fabric covering with two-seats-in-side-by-side configuration enclosed cockpit and a fixed conventional tail-wheel landing gear. Originally with a single à  koda Favorit 63B engine but options for other à  koda, Rotax and Subaru car engines were available.