原上猿（Propliopithecus）是一属已灭绝的猿。

原上猿长40厘米，像今天的长臂猿。牠的眼睛向前，有立体视觉。原上猿最有可能是杂食性的。原上猿有可能其实与埃及猿是同一种生物。若真的是这样，原上猿的学名则会较埃及猿的优先。<ref name = Palmer>Palmer, Douglas. The Marshall Illustrated Encyclopedia of Dinosaurs &. London: Marshall Editions Developments Ltd. 1999. ISBN 3-8290-6747-X. </ref>

Propliopithecus is an extinct genus of primate.

The 40 cm (1 ft 4 in) long creature resembled today's gibbons. Its eyes faced forwards, giving it stereoscopical vision. Propliopithecus was most likely an omnivore. It is possible that Propliopithecus is the same creature as Aegyptopithecus. If that would be the case the name Propliopithecus would take precedence over Aegyptopithecus according to ICZN rules, because it was coined earlier.