后赵武帝石虎（29<a target='_blank' style='color:#136ec2' href=/citiao/24597.html>5年</a>－34<a target='_blank' style='color:#136ec2' href=/citiao/112029.html>9年</a>），字季龙，<a target='_blank' style='color:#136ec2' href=/citiao/43230.html>五胡十六国</a>中<a target='_blank' style='color:#136ec2' href=/citiao/39299.html>后赵</a>的第三位<a target='_blank' style='color:#136ec2' href=/citiao/39364.html>皇帝</a>，为<a target='_blank' style='color:#136ec2' href=/citiao/46344.html>石勒</a>的侄子。<a target='_blank' style='color:#136ec2' href=/citiao/48494.html>建平</a>四年（3<a target='_blank' style='color:#136ec2' href=/citiao/108888.html>33年</a>），石勒<a target='_blank' style='color:#136ec2' href=/citiao/36213.html>驾崩</a>，其皇位由<a target='_blank' style='color:#136ec2' href=/citiao/54401.html>儿子</a><a target='_blank' style='color:#136ec2' href=/citiao/132702.html>石弘</a><a target='_blank' style='color:#136ec2' href=/citiao/58616.html>继承</a>。因<a target='_blank' style='color:#136ec2' href=/citiao/121091.html>石虎</a>掌握兵权势大，石勒妻<a target='_blank' style='color:#136ec2' href=/citiao/127351.html>刘太</a>后与养子<a target='_blank' style='color:#136ec2' href=/citiao/141511.html>石堪</a>拥立<a target='_blank' style='color:#136ec2' href=/citiao/111650.html>石恢</a>（刘<a target='_blank' style='color:#136ec2' href=/citiao/131484.html>太后</a>儿子）欲举兵反对石虎，不幸事泄，刘太后被杀，石堪被捕活活烤死，石恢被捕。咸<a target='_blank' style='color:#136ec2' href=/citiao/38483.html>康元</a>年（334年），石弘持玺绶向石虎表明愿意禅位，石弘被废为海阳王，同年杀海阳<a target='_blank' style='color:#136ec2' href=/citiao/110524.html>王石</a>弘、弘母<a target='_blank' style='color:#136ec2' href=/citiao/467853.html>程氏</a>、<a target='_blank' style='color:#136ec2' href=/citiao/178965.html>秦王</a><a target='_blank' style='color:#136ec2' href=/citiao/45485.html>石宏</a>、南阳王石恢。<a target='_blank' style='color:#136ec2' href=/citiao/47937.html>太宁</a>元年（349年），石虎正式即皇帝位。因其残暴好色，故被评为五胡十六国中的暴君。