Aldo Pruna Diaz (born 12 May 1983) is an athlete from Cuba. He competes in canoeing.

Diaz competed at the 2004 Summer Olympics in men's 500 metre individual canoe.

He placed third in the initial heat of the 500 metre with a time of 1:50.246, qualifying for the semifinals. In the semifinal, he placed fourth with a time of 1:53.229, just missing the third-place requirement to advance to the final.