Zhang Ni (190s - 254), courtesy name Boqi, rendered also as Zhang Yi, was a military general of the state of Shu Han during the Three Kingdoms period of China. Famous for his courage and generosity, Zhang Ni made his name known while rescuing a magistrate's wife from bandits and leading her to safety.

Zhang Ni was active in the pacification of the indigenous tribes residing within and around Shu's borders. He spent at least 18 years dealing with the continuum of domestic uprisings centered around the Yuexi/Yuesui and Ba commanderies, where he often looked for humane solutions and sought to make peace or negotiate with the tribes when he could.

During Jiang Wei's seventh Northern Expedition, he was killed in battle against the Wei general Xu Zhi after forcing the enemy to retreat.

Zhang Ni had the reputation of being one of the more successful later generals of the Shu Han state. Liu Shan, emperor of the Shu Han dynasty at the time of his service, compared him to the great heroes of antiquity, while Chen Shou in his appraisal of Zhang also referenced this comparison.

Zhang Ni was from Nanchong County (南充縣), Ba Commandery (巴郡), which is present-day Nanchong, Sichuan. Zhang Ni at a young age was orphaned and lived in poverty yet he already had a reputation of a strong and generous youth. He started his career as an Officer of Merit (功曹) at his local county office when he reached adulthood (around 19 years old). In 214, when the warlord Liu Bei seized control of Yi Province (covering present-day Sichuan and Chongqing) from its provincial governor Liu Zhang, some bandits used the opportunity to raid the county office. During the ensuing chaos, Zhang Ni engaged the bandits in close combat and protected the county magistrate's wife. He became famous for his courageous actions and was later summoned to the commander's office to serve as an Assistant Officer (從事).

While he served as Assistant Officer in Ba Commandery, two scholars, Gong Lu and Yao Zhou were appointed with greater rank and salary than him within the same commandery. At the time, they both enjoyed good reputation and fame however both of them had heard of Zhang Ni's accomplishments hence they respected and became friends with him.

Around 227, when the Shu Han chancellor Zhuge Liang was assembling forces in Hanzhong Commandery in preparation for the first of a series of campaigns against Shu's rival state Wei, local bandits pillaged villages in the Hanzhong, Guanghan and Mianzhu commanderies. Zhang Ni, then holding the rank of an acting Commandant led his troops to deal with the bandits who scattered and hid in different locations when they heard of Zhang Ni's approach. Zhang Ni could not force them to come out to fight him so he pretended to offer to extend a heqin policy to the bandit chiefs and then managed to coax them into attending a banquet to celebrate the peace. After the unsuspecting bandit chiefs got drunk, Zhang Ni ordered his men to kill all of them and then sent his troops to hunt down and eliminate the rest. The massacre lasted for about 10 days, after which the area was clear of bandits.

After that, Zhang Ni fell seriously ill unfortunately his family was too poor to afford a good doctor and treatment. However, the Administrator of Guanghan (廣漢太守), He Zhi was known as a generous man and talented doctor so Zhang Ni thought that he should appeal to him. Since Zhang Ni and He Zhi did not know each other well and despite his illness, Zhang Ni personally took a carriage to visit He Zhi to entrust him with a treatment that could cure his illness. He Zhi knew of Zhang Ni's reputation as a brave and generous man so he did not spare any expense to cure him. Finally, after several years the illness was cured. Both of them remained friends after this event.