The MAI-223 Kityonok (Russian: МАИ-223 «Китенок», English: MAI-223 Whale Calf) is a single-engine STOL ultralight aircraft developed by the Moscow Aviation Institute's special design bureau (OSKBEC) from 2002.

Though the prototype had a partly fabric-covered fuselage, later Kityonoks have glass fibre skins everywhere except for control surfaces.

The tailplane is trapezoidal and set at the top of the fuselage; there is an electrically operated trim tab on the port elevator.

The Kityonok has a conventional undercarriage with main wheels on backward-leaning cantilever legs mounted on torsion bars in the lower fuselage.

Plans were announced that year for production of the MAI-223SKh crop sprayer version at UZGA (The Ural Works of Civil Aviation) at Ekaterinburg.