Duke Jing of Qi (Chinese: 齊景公; pinyin: Qí Jǐng Gōng; died 490 BC) was ruler of the State of Qi from 547 to 490 BC. Qi was a major power during the Spring and Autumn period of ancient China. His personal name was Lü Chujiu (呂杵臼), ancestral name Jiang (), and Duke Jing was his posthumous title. After the years of unrest as two powerful ministers, Cui Zhu and Qing Feng, sought to control the state of Qi, Duke Jing appointed Yan Ying as his prime minister, and Qi entered a period of relative peace and prosperity.

Duke Jing was born to a concubine of Duke Ling of Qi. His mother was a daughter of Shusun Xuanbo, head of one of the Three Huan clans that dominated the control of power in the neighbouring State of Lu. When his father died in 554 BC, his older half-brother Duke Zhuang succeeded Duke Ling and killed Crown Prince Ya with the support of the powerful minister Cui Zhu (崔杼). However, Duke Zhuang had an adulterous relationship with Cui's wife, and was killed by Cui in 548 BC.

The day after killing Duke Zhuang, Cui Zhu installed Duke Jing on the throne. Cui and Qing Feng (慶封), another powerful nobleman, were Duke Jing's co-prime ministers and controlled the state.

In 546 BC, the second year of Duke Jing's reign, the sons of Cui Zhu's two wives fought each other for the right to succeed their father as leader of the clan. The two sons of Cui's deceased first wife killed the son of Cui's second wife, Tang Jiang, from her previous marriage. Cui sought help from Qing Feng, who took the opportunity to kill Cui's sons and exterminate the Cui clan. Cui Zhu and his wife both committed suicide. As a result, Qing Feng gained full control of Qi.

Qing Feng's power did not last long. Just a year later, Qing Feng had a dispute with his son Qing She. Taking advantage of the discord within the Qing clan, four other aristocratic clans of Qi: Tian, Bao, Gao, and Luan, jointly attacked the Qing clan. Qing Feng fled to the State of Lu, which soon expelled him for fear of offending Qi, and Qing settled in the State of Wu.

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