Kočapar (Serbian Cyrillic: Кочапар) was the knez or župan of Duklja, a Serbian state, briefly in 1102–03 under the suzerainty of Vukan, Grand Prince of Serbia.
Kočopar, Bodin's first cousin once removed, travelled from Dyrrhachium to Serbia, forging an alliance with Vukan.
The battle that ensued at the Morača led to the overthrow of Dobroslav II and the coronation of Kočapar to the throne.
Dobroslav was subsequently banished to Serbia and a large part of Dalmatia was pillaged in the process.
The two would soon brake, with Vukan, sending a squad to Doclea (city), forcing Kočapar to flee to Bosnia and then Zahumlje where he also died.