Life

Sun Jun was a great-grandson of Sun Jing, an uncle of Wu's founding emperor Sun Quan. Late in Sun Quan's reign, he became a trusted personal assistant of Sun Quan's, and he was said to have been, in conjunction with Sun Quan's daughter Sun Luban, involved in falsely accusing the crown prince Sun He, leading to Sun He's deposal in 250. At his and Sun Luban's recommendation, Sun Quan created his youngest son Sun Liang as his successor. Again at Sun Jun's recommendation, Sun Quan named Zhuge Ke regent for Sun Liang in 251, and after his death in 252, Sun Jun became a key assistant to Zhuge.

In 253, after Zhuge Ke had suffered a major military defeat to Wu's rival state, Cao Wei, and subsequently refused to admit fault but instead tried to wipe out all dissent, Sun Jun assassinated him and took over as regent. There was initial anticipation that he might be willing to share power with other key officials, but he instead consolidated power into his own hands. He was not known for his accomplishments during his regency, and he was severe in his punishments. As a result, there were several conspiracies against his life during his regency, including one in 254 led by Sun Ying (孫英), the Marquis of Wu, the son of Sun Quan's eldest son Sun Deng, and one in 255, which Sun Luban (with whom Sun Jun might have had an affair) falsely accused her sister Sun Luyu of being the leader of, and Sun Jun had Sun Luyu executed.

In 256, at the urging of Wen Qin, a Wei general who had surrendered to Wu after a rebellion of his and Guanqiu Jian's failed, Sun Jun considered launching a major attack against Wei, but as he was about to do so, he grew ill. He transferred his powers to his cousin Sun Chen and then died. Sun Chen succeeded him.

In 258, after Sun Chen had deposed Sun Liang and had in turn been executed by the succeeding emperor Sun Xiu, Sun Jun's casket was disinterred and reduced in size, as a sign of imperial disapproval; both Sun Jun and Sun Chen were posthumously banished from the royal family and renamed Gu Jun (故峻) and Gu Chen (故綝) respectively.

生平

孫峻的曾祖父孫靜是孫堅之弟，孫靜長子孫暠的第三子孫恭，為孫峻之父。

早年

孫峻年少時弓馬嫻熟，精明果敢，膽大有決斷。孫權晚年時，孫峻升任武衛都尉，並任侍中。曾向孫權推薦諸葛恪。孫權臨死前孫峻受遺詔與諸葛恪、滕胤共同輔政，領武衛將軍，封都鄉侯。

誅殺諸葛恪

孫權死後，諸葛恪專權。建興二年春（253年），諸葛恪不聽勸諫，勞師動眾徵調大軍二十萬出兵攻打曹魏，逐漸失去民心。諸葛恪圍攻合肥新城但久攻不下，軍中爆發疾病，很多將士病倒，將領報告但諸葛恪認為是謊報，不予理會。曹魏趁勢進兵，諸葛恪才撤軍，但吳軍已傷亡慘重，上下怨聲載道。諸葛恪出征歸來後，將先前選曹奏准任命的各衙署長官全部罷免，重新挑選。又更換宮廷守衛，任用自己的親信，並整理軍備，準備進攻青、徐二州。孫峻見諸葛恪民心漸失，與吳主孫亮密謀後發動政變，于酒宴中設伏兵殺死諸葛恪，滅其三族。

賜死孫和

建興二年冬（253年），孫峻誅殺諸葛恪後，升為丞相大將軍，都督國內外軍事，授予符節，封富春侯。同年，孫峻為巴結全公主孫魯班，將廢太子孫和遷移到新都居住，後派使者賜死孫和，孫和正妃張氏也隨之自殺。

圖謀伐魏及身亡

五鳳元年（254年），吳侯孫英密謀誅殺孫峻，因事情敗露而自殺（一說孫英不知情而被捲入，只得自殺）。次年，魏將毌丘儉、文欽反叛，與魏軍交戰于樂嘉，孫峻率領驃騎將軍呂據、左將軍留贊偷襲壽春，正好遇到文欽兵敗來投，吳軍就此撤回，回師途中在高亭打敗魏將曹珍，但吳軍也被諸葛誕部下蔣班追上，留贊戰死。同年，將軍孫儀、張怡、林恂等想趁孫峻會見蜀漢使者時密謀誅殺孫峻，因事情敗露，孫儀等自殺，受牽連被殺者數十人，其中包括朱公主孫魯育。

太平元年（256年），孫峻受文欽慫恿伐魏，派文欽和呂據、車騎將軍劉纂、鎮南將軍朱異、前將軍唐咨率軍從江都進入淮、泗一帶，以便占領青州和徐州。孫峻和滕胤來到石頭城為軍隊踐行，孫峻看到呂據率領的軍隊部伍整齊，心生厭惡，藉口心口疼痛離去。當夜做夢被諸葛恪的冤魂用劍擊中，驚懼發病而死，後事託付給堂弟孫綝。

死後

吳景帝孫休誅殺孫綝後，又因孫峻殺孫魯育等人，將孫峻的墳墓刨開，殉葬的印章綬帶沒收，棺槨削薄後重新安葬。孫休又恥于與孫峻、孫綝同族，將二人族籍從族譜中削除，稱之為「故峻、故綝」。

演義形象

《三國演義》中，太傅諸葛恪在東興之戰大敗歸來後，唯恐百官議論，輕則流放，重則斬殺，又任用心腹張約、朱恩掌管御林軍。太常卿滕胤與諸葛恪有隙，見諸葛恪大失民心，與吳主孫亮、孫峻設宴誅殺諸葛恪並族滅其三族，朝政大權落入孫峻手中。孫綝被吳景帝孫休誅殺後，孫峻遭開棺戮尸。

家庭

曾祖：

• 孫靜，孫堅之弟。

祖父：

• 孫暠，孫靜長子。

父親：

• 孫恭，孫暠三子。

姐妹：

• 孫氏，孫峻姐，嫁全尚

• 孫氏，孫峻妹，嫁朱據子朱損

堂弟：

• 孫綝，字子通，孫綽之子。

• 孫恩、孫據、孫幹、孫闓，孫綝弟。

• 孫慮，一作孫憲，孫超之子。

評價

陳壽：「峻素無重名，驕矜險害，多所刑殺，百姓囂然。又奸亂宮人，與公主魯班私通。」「峻、綝凶豎盈溢，固無足論者。」（《三國志·吳書十九·諸葛滕二孫濮陽傳》）