An extreme ultraviolet light generation apparatus that generates extreme ultraviolet light by irradiating a target with a pulse laser beam includes: a chamber; a magnet that is positioned outside the chamber and forms a magnetic field (70) inside the chamber; a discharge path (37a) that is opened at a position on an inner wall surface of the chamber where the inner wall surface intersects a central axis of the magnetic field (70) and through which gas inside the chamber is discharged; and a gas supply unit (10a) configured to supply gas into the discharge path (37a) through an inner wall surface of the discharge path.