2018–19 Biathlon World Cup – Mass start Men

The 2018–19 Biathlon World Cup – Mass start Men started on Sunday 23 December 2018 in Nové Město and finished on Sunday 24 March 2019 in Oslo Holmenkollen. The defending titlist was Martin Fourcade of France.

The small crystal globe winner for the category was Johannes Thingnes Bø of Norway.

Competition format
In the mass start, all biathletes start at the same time and the first across the finish line wins. In this 15 km competition, the distance is skied over five laps; there are four bouts of shooting (two prone and two standing, in that order) with the first shooting bout being at the lane corresponding to the competitor's bib number (bib #10 shoots at lane #10 regardless of position in race), with the rest of the shooting bouts being on a first-come, first-served basis (if a competitor arrives at the lane in fifth place, they shoot at lane 5). As in the sprint and pursuit, competitors must ski one 150 m penalty loop for each miss. Here again, to avoid unwanted congestion, World Cup Mass starts are held with only the 30 top ranking athletes on the start line (half that of the pursuit) as here all contestants start simultaneously.