张安世（？ - 前62年），字子孺，京兆杜陵人（今西安市东南），西汉汉武帝到汉宣帝时代的三朝重臣。

他是著名酷吏张汤之子，受父荫在少年时代即做郎官，到尚书令手下做事。张汤被迫自杀后，汉武帝继续重用张安世，任尚书令、升任光禄大夫，太子刘据案发后受兄长张贺牵连；汉昭帝时，霍光灭掉其他的托孤大臣上官桀、桑弘羊与鄂邑长公主、燕王刘旦之后，任命张安世为右将军光禄勋，以辅佐有功，元凤六年（公元前75年）封富平侯。张安世坚决反对兄长张贺把女儿嫁给前太子刘据的长孙刘病已。

昭帝暴亡后，霍光请求太后任命张安世为车骑将军。张安世配合霍光立、废昌邑王刘贺，改立刘病已为帝（汉宣帝）。宣帝为安抚张安世，把他的三个儿子千秋、延寿、彭祖入宫任职。霍光于地节二年（公元前68年）去世，张安世在御前力辞大将军职衔，但仍被任命为大司马车骑将军，不久又改任大司马卫将军，领尚书事，集军政大权于一身，以为官廉洁著称。地节四年（前66年），宣帝族灭霍家，但赦免了嫁入霍家的张安世孙女张敬。张安世在宣帝一朝处事极为谨慎，最后平安告老。

其曾孙张临，尚敬武公主，生子张放。

2007年，其墓地在西安南郊凤栖原被发现，其墓葬级别非常高，与周围张氏家族后代的墓地形成一个占地广大的家族墓地群。出土的「张」字铜印和「卫将长史」封泥，断定大墓主人就是张安世。因为根据史书记载，西汉姓张的卫将军唯有张安世一人。

显示更多...: 世系图   参考资料和注释  

Zhang Anshi (张安世 Zhāng Ānshì; died 62 BCE), courtesy name Ziru (子孺), was a Chinese politician of the Han Dynasty. He was a son of Zhang Tang.

He was a precocious student who attracted attention in a famous incident. During an Imperial progress, to which he was attached in a subordinate capacity, three boxes of books were missing. However, he was able to repeat the contents of each so accurately that upon the recovery of the books, they were found to tally exactly with his description. Emperor Wu immediately appointed him to high office; Emperor Wu promoted him further after Zhang Tang's death.

He played a part in deposing Liu He as emperor, and subsequently rose under Emperor Xuan to be President of the Board of War, in succession to Huo Guang. After his death, his posthumous title was "Marquis Jing" (敬侯).

Zhang Anshi was well-known to be cautious in both his mannerisms and how he is perceived by others. As the President of the Board of War, he came to know that Emperor Xuan had promoted his son Yanshou. Anshi then attempted to resign his position, but was refused by Emperor Xuan. Later, he advised Yanshou to leave the capital and become an official elsewhere, as he worried that with both father and son in high positions within the capital, they would become targets.

Zhang Anshi's elder brother Zhang He was close to Emperor Wu's first crown prince Liu Ju. With Liu Ju's suicide after his failed rebellion, Zhang He was implicated and sentenced to death. Anshi pleaded for clemency; He's sentence was commuted to castration. Anshi's youngest son Pengzu was then given to He and regarded as He's heir.