Savcı Bey (died in 1374) was a prince who, with Andronikos, rebelled against both of their fathers, the Ottoman Sultan Murad I and the Byzantine Emperor John V Palaiologos, respectively, in the 1370s.

In Ottoman tradition, all princes (Turkish: şehzade) were required to serve as provincial (sanjak) governors as a part of their training.

When Ottoman Turks captured Edirne (Adrianopolis), Byzantine emperor John V Palaiologos appealed to the West for help.

Andronikos (later Andronikos IV Palaiologos), his son and regent in Constantinople (modern Istanbul, Turkey), refused to pay the ransom for his father, and John had to give up the island Tenedos (modern Bozcaada, Turkey) to buy his freedom.

The armies of the fathers and the sons met in Apikridion (an ambiguous location probably southwest of Constantinople), where Murat persuaded Savcı's soldiers to switch sides.