Lutter is a small river in the Lüneburg Heath, Lower Saxony, Germany, right tributary of the Lachte.

The Lutter has its source near Weyhausen [de] (district of Eschede), 7 km (4.3 mi) southeast of Unterlüß.

It passes Bargfeld (where it is joined by the Schmalwasser), Eldingen, and Luttern (a district of Eldingen).

It flows into the river Lachte at Jarnsen [de], near Lachendorf, east of Celle.

This article related to a river in Lower Saxony is a stub.