Xin Pi (Chinese: 辛毗) is a minor character in the 14th-century Chinese classic novel Romance of the Three Kingdoms by the late Luo Guanzhong, and its multiple adaptations. He is Xin Ping's younger brother and a father of Xin Xianying and Xin Chang.
Xin Pi initially with Xin Ping to served Yuan Shao, he was said to be a tough and honest. When Cao Cao was appointed as the empty time and asked Xin Pi, but Xin Pi should not believe him. After Yuan Shao dies, his two sons Yuan Tan and Yuan Shang were guilty. Yuan Shang attacked Yuan Tan in plain, Yuan Tan was defeated and Xin Pi was ordered to summon Cao Cao. At the time, Cao Cao was tried to conquer Jing Province.
After listening to the Xin Pi statement, he was very happy so much and even wanted to attack Jing Province first, Xin Pi believes that it is the best time to defeat Yuan Shang and Yuan family, it is suggested that Cao Cao should first flatten Hebei. Likewise, Yuan Shang becomes stronger in the future and lose the best chance to calm down Hebei. Xin Pi finally persuaded Cao Cao and attacked Yuan Shang's shackles in the following year, Xin Pi was the confidant and later followed Cao Cao.
When Zhuge Liang led the troops to defeat Wei, Sima Yi several times to asked Cao Rui, but Cao Rui never wanted to fight with them and Xin Pi as the general army division. Sima Yi has had several attempts to attacked, but Xin Pi is not allowed to make Sima Yi unable to go out. After Zhuge Liang's death, Xin Pi was re-established as a defending officer. However, he died of illness and Xin Xianying was very sad, so the whole family held his funeral together.
- He is non-playable character in the Dynasty Warriors series.