Maljen (Serbian: Маљен) (pronounced [mâʎɛn]) is a mountain in western Serbia, just south of the city of Valjevo.

On Maljen is situated resort Divčibare with 3 hotels, 24 holiday camps, two mountain lodges and two ski trails.

During summer the slopes of the mountain are covered with flower meadows with white daffodils.

A 12.5 km (7.8 mi) long path into the canyon, which includes hiking, descending or walking through water, was adapted for tourists.

The canyon, which is some 120 km (75 mi) southwest from Belgrade, is protected by the state as the natural reserve.