市民フォーラム
In the 1990 elections he was elected to parliament for Civic Forum, representing the Central Bohemian Region. When Civic Forum disbanded in 1991, he joined ČSSD, leading the party's election campaign in elections in 1992, at which he defended his mandate. He remained in the Federal Assembly until the dissolution of Czechoslovakia, of which he was a strong critic. Following the dissolution, and the abolition of the Forecasting Institute of the Czechoslovak Academy, Komárek withdrew from public life.