The Odachi clan (大舘 or 大館) was a branch family of Nitta family which was allied to the Ashikaga family, and had held important posts in the Muromachi bakufu.
大舘氏（「大館」とも表記する）は、足利家と同族の新田家支族であり、代々室町幕府の重職を務めてきた家柄だ。