Erchanger (or Erchangar) (c. 860/880 – 21 January 917) was the duke of Swabia from September 915 to his death.
In 911, he allied with Bishop Solomon III of Constance due their common political goals.
With the fall of the Burchards, Erchanger and his younger brother Berthold were the most powerful counts in the tribe.
Erchanger returned in 915 and was fighting alongside his nephew Arnulf of Bavaria and his old enemy Burchard II against the Magyars.
[a][1] However, at a high court in Hohenaltheim in September 916, Erchanger was condemned to a monastery for offences against king and bishop.