2009–10 Czech First League
The 2009–10 Czech First League, known as the Gambrinus liga for sponsorship reasons, was the seventeenth season of the Czech Republic's top-tier football. It started on 24 July 2009 and ended on 15 May 2010. Defending champions Slavia Prague could only finish seventh in the league, 21 points behind eventual winners Sparta Prague.
Team changes from last season
and FC Tescoma Zlín were relegated to the second division after finishing last and second to last, respectively, in the 2008–09 Czech First League.Bohemians 1905 were promoted from the second division as champions. Second division runners-up FC Zenit Čáslav decided not to enter the Czech First League and sold the rights to 1. FC Slovácko, who were promoted in their place.
Team overview
| Team | Location | Stadium | Capacity |
| Baník Ostrava | Ostrava | Bazaly | 17,372 |
| Bohemians 1905 | Prague | Ďolíček Stadion Note 2 | 7,500 |
| FC Bohemians | Prague | Stadion Evžena Rošického Note 1 | 19,032 |
| 1. FC Brno | Brno | Městský fotbalový stadion Srbská | 12,550 |
| Dynamo České Budějovice | E-On Stadion | 6,708 | |
| FK Jablonec 97 | Jablonec | Stadion Střelnice | 6,280 |
| SK Kladno | Kladno | Stadion Františka Kloze Note 2 | 4,000 |
| FK Mladá Boleslav | Mladá Boleslav | Městský stadion | 5,000 |
| 1. FK Příbram | Příbram | Na Litavce | 9,100 |
| Sigma Olomouc | Olomouc | Andrův stadion | 12,072 |
| Slavia Prague | Prague | Synot Tip Arena | 21,000 |
| 1. FC Slovácko | Uherské Hradiště | Městský fotbalový stadion Miroslava Valenty | 8,121 |
| Slovan Liberec | Liberec | Stadion u Nisy | 9,900 |
| Sparta Prague | Prague | Generali Arena | 20,852 |
| FK Teplice | Teplice | Na Stínadlech | 18,221 |
| Viktoria Plzeň | Plzeň | Štruncovy Sady Stadion | 7,842 |
Notes:
- Bohemians Prague were previously playing at FK Viktoria Stadion, but were not allowed to continue due to league rules regarding under-soil heating. Therefore, Bohemians played their home matches in the 2009–10 season at Stadion Evžena Rošického.
- Bohemians 1905 and Kladno played one home match each at Stadion Evžena Rošického after the winter break due to under-soil heating requirements.
Managerial changes
| Team | Outgoing manager | Manner of departure | Date of vacancy | Incoming manager | Date of appointment |
| FC Bohemians |  Robert Žák | Sacked | 17 August 2009 | Jaromír Jindráček | 22 August 2009 |