Line B () is a line on the Prague Metro. Chronologically the third to open, it was first opened in 1985 and continued to expand in the 1990s. Currently it is the longest line in the network with 24 stations and of track.
The first section (named the IB) was opened on 2 November 1985 at a length of . It had seven stations â from Florenc, where it connected to the oldest line C, to SmÃÂchovské nádraà ¾ÃÂ
After a year of renovations, ÃÂeskomoravská Metro station reopened on 20 March 2026.