Dumitru-Dorin Prunariu (born 27 September 1952) is a Romanian cosmonaut. He flew in space aboard Soyuz 40 spacecraft and Salyut 6 space laboratory. He teamed with the Soviet cosmonaut Leonid Popov. The backup crew was made of Romanian candidate cosmonaut Dumitru Dediu and Soviet cosmonaut Yuri Romanenko.