Śliwnik [ˈɕlivnik] (German: Schadendorf) is a village in the administrative district of Gmina Małomice, within Żagań County, Lubusz Voivodeship, in western Poland. It lies approximately 4 kilometres (2 mi) south-east of Małomice, 15 km (9 mi) south-east of Żagań, and 46 km (29 mi) south of Zielona Góra.
Before 1945 the area was part of Germany (see Territorial changes of Poland after World War II). The native German population was expelled and replaced with Poles.
Coordinates: 51°32′N 15°29′E / 51.533°N 15.483°E