Héctor Decio Rossetto (8 September 1922 in Bahía Blanca, Argentina – 23 January 2009 in Buenos Aires) was an Argentine chess player.

[1] Rossetto won the Mar del Plata chess tournament in 1949 and again in 1952 (shared with Julio Bolbochán).

[3] He was the director of the 1978 Chess Olympiad in Buenos Aires.

He was a player from the "golden age" of chess in Argentina, led by Miguel Najdorf, with Erich Eliskases, Hermann Pilnik, Carlos Guimard, Julio Bolbochán, and young Oscar Panno.

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