Dongtuna is a fictional character in Luo Guanzhong's historical novel Romance of the Three Kingdoms. He was a general (rank of second cave governor) serving under the Nanman chieftain Meng Huo.
During the battle against Shu Han, Dongtuna assisted Meng along with Ahuinan, and many others. At one time Dongtuna ended up being captured by Shu Han's chancellor Zhuge Liang, but was released.
Dongtuna and Ahuinan later plotted against Meng Huo and captured him by surprise and presented him to Zhuge Liang. Meng complained that he was betrayed and captured by his own men, so it was unfair. Zhuge released him for the second time. When Meng returned to his camp, he lured Dongtuna and Ahuinan into a trap and had them executed and dumped their bodies into a brook.