The station was opened 1 July 1924 as part of the tramway Lilleaker Line.[1]
Along with most of the line, Haslum closed for upgrades on 1 July 2006 and its service was temporarily provided by bus.[2] Haslum among other things, received longer platforms which can accommodate trains with up to six cars like most of the subway system. It reopened on 15 December 2013.