姜齐
(?
前642年～
前633年)
齐孝公（－前633年），名
姜昭，中国春秋时期齐国国君，齐桓公之子、母亲为葛嬴。前642年至前633年在位。
早年齐桓公和管仲立其为太子，并嘱托宋襄公予以照应。前643年，桓公卒，另外五子争夺君位，原桓公宠臣易牙与竖刁拥立公子无亏为君，
姜昭逃奔宋国。前642年春，宋襄公联合曹国、卫国、邾国领兵攻齐，以助
姜昭归国争位。三月，迫于诸侯军队的压力，齐众大夫在国氏、高氏两家的率领下诱杀竖刁、无亏，迎立太子昭。但其余四公子的追随者兴兵攻打已入齐境的太子昭，迫使其逃回宋国。五月，宋襄公再度发兵，击败齐众公子于甗(今山东济南附近)，太子昭遂得以入齐都临淄(今山东淄博临淄)即位。此次动乱之后，齐国国力衰落，齐桓公霸业告终。
【有恃无恐】的典故
鲁僖公二十六年（前634年）夏，鲁国大饥，齐孝公趁机攻鲁。鲁大夫展喜日夜兼程，在齐鲁边界上遭遇孝公，以牛羊、酒食犒劳齐国军队。《古文观止》一篇文章，描述两人的对白：
齐侯曰：“鲁人恐乎？”对曰：“小人恐矣，君子则否。”齐侯曰：“室如县罄，野无青草，何恃而不恐？”对曰：“恃先王之命。昔周公、大公股肱周室，夹辅成王。成王劳之而赐之盟，曰：‘世世子孙，无相害也。’载在盟府，大师职之。桓公是以纠合诸侯，而谋其不协，弥缝其阙，而匡救其灾，昭旧职也。及君即位，诸侯之望曰：‘其率桓之功。’我敝邑用不敢保聚，曰：‘岂其嗣世九年而弃命废职？其若先君何？君必不然。’恃此以不恐。”齐孝公无言以对，班师回家。
Qi Hou said: "Lu people fear?" He replied: "Villains fear men, and gentlemen are not." Qi Hou said: "rooms such as the county exhausted, no wild grass, without fear of any dependable?" Replied: " rely first and Wang Zhiming. former Duke, the Grand Duke of Zhou Gu Gong, Fu Cheng Wang folder. into the king of the gift of the Labour Union, said: 'ages of children, with no harm also.' contained in the Union government, the master level. Huan is to gathered nobility, but it does not co-plan, build bridges over the palace, while Kuangjiu the disaster, Zhao old job too. and the monarch came to the throne, princes of hope, saying: 'The rate of Huan's achievements.' I can not guarantee together with Bi Yi, said: 'Qi abandon his heir life spent nine world level? its Xianjun What if? Jun will be otherwise.' relies on this to not fear. "Qi Xiaogong speechless triumphant return home.