Fatburen is a small lake in Tyresö Municipality, south-east of central Stockholm, Sweden.

It is separated from Albysjön by the peninsula Rävnäset, a municipal nature reserve covering 27 ha.

[3] It contains a wide range of rare species and is together with the nature and park surrounding Tyresö Palace one of the best locales for bats.

In summers, the lake is part of a popular walk for visitors attracted by the Tyresö Palace and its surroundings.

[1] Common fishes include Perch, Pike, and Zander.