The Rozhen Monastery of the Nativity of the Mother of God (Bulgarian: Роженски манастир "Рождество Богородично", Rozhenski manastir "Rozhdestvo Bogorodichno", Greek: Μονή Ροζινού, Moni Rozinou) is the biggest monastery in the Pirin Mountains in southwestern Bulgaria, nestled in the Melnik Earth Pyramids.

The earliest archaeological evidence of medieval life at the place is a grave with a few coins and decorations from the time of Byzantine Emperor Michael VIII Palaiologos (1259–1282).

The earliest written source testifying to the monastery's existence is a note on a chant book from 1551, today in the Great Lavra library on Mount Athos.

The Rozhen Monastery was devastated by fire between 1662 and 1674, destroying the library and severely damaging most buildings.

The monastery reached its apogee in the 19th century, when it was a regional centre of Orthodox Christianity and owned a lot of land in the area.