2017–18 Czech First League

The 2017–18 Czech First League, known as the HET liga for sponsorship reasons, was the 25th season of the Czech Republic's top-tier football league. The defending champions were Slavia Prague, who won their fourth Czech title the previous season. The season began on 28 July 2017 and ended on 26 May 2018.

Viktoria Plzeň made a league record by winning their first 14 league games of the season.

Results
Each team plays home-and-away against every other team in the league, for a total of 30 matches played each.