源义家（1039年－1106年8月4日），日本平安时代后期的著名武将，河内源氏嫡流出身，通称「八幡太郎」或「八幡太郎义家」。「新罗三郎」源义光之兄。

源义家在前九年之役、后三年之役中成功镇压了安倍氏、清原氏等虾夷败战豪族的反乱，之后在关东乱事中亦大显神威，被白河法皇誉为「天下第一武勇之士」。

源义家致力于士族地位的确保，成为武士的领袖，其言行处事也树立了武士道的典范。但后来由于白河法皇怀疑源义家对奥州怀有野心，加以院政派当权，刻意削弱摄关公卿派及源义家的武力，因而势力日衰。官至正四位下加允升殿，大正年间追赠正三位。

Minamoto no Yoshiie (源 義家; 1039 – 4 August 1106), also known as Hachimantarō, was a Minamoto clan samurai of the late Heian period, and Chinjufu shogun (Commander-in-chief of the defense of the North).

The first son of Minamoto no Yoriyoshi, he proved himself in battle with the Abe clan in the Zenkunen War (Early Nine Years' War) and the Kiyohara clan in the Gosannen War (Later Three Years' War). Subsequently, he became something of a paragon of samurai skill and bravery.