Roskildevej is a road between Copenhagen and Roskilde in the Danish capital area.
The direct continuation of Vesterbrogade, which begins at Copenhagen's City Hall Square, the road begins at Pile Allé and continues through Frederiksberg, Valby, Rødovre, Glostrup, Albertslund, Taastrup and Hedehusene to Roskilde.
The total distance from Copenhagen City Hall Square to Algade in Roskilde is about 31 km.
The project was led by the French road engineer Jean Marmillod who had been called to Copenhagen by Prime Minister Count Johann Hartwig Ernst von Bernstorff in 1753 to improve the road.
At Pelargonievej, there is a neighbourhood of single family detached housing which dates from the 1890s.