Duarte Manuel de Almeida Bello (26 July 1921 – 3 June 1994) was a Portuguese sailor who competed at the 1948, 1952, 1956, 1960 and 1964 Olympics.

[1] He won a silver medal in the Swallow class in 1948, together with his brother Fernando Pinto Coelho Bello, and placed fourth in 1952 and 1956.

[2] Bello also raced Star class keelboats, winning silver medals at the 1953 and 1962 World Championship, and a bronze in 1952.

He was known as an equipment innovator who invented several devices, including automatic "Bello bailers" in 1954, and the circular boom-vang track at the early 1960s.

In 1943, he married Maria Antonia Carneiro Bustorff Silva, daughter of one of Portugal's most prominent lawyers of the time, as well as a sailor.