Ubiratan "Bira" Pereira Maciel, commonly known as Bira Maciel, or simply Bira (January 18, 1944 – July 17, 2002), was a professional basketball player from Brazil.
He was born in São Paulo, Brazil.
At a height of 1.99 m (6' 6?1/2") tall, he played at the center position.
He is often regarded as the best Brazilian center of all time.