Career
Koloušek began his Football career in the youth team of his hometown club FK Mladá Boleslav. From there he went to Dukla Prague. At the age of 21 he left for Italy and joined Salernitana Sport.
After 2 years with Salernitana he moved on to Fermana Calcio.
In 1999 he came back home to Sparta Prague. In 2001 he moved again to Slovan Liberec, During his time at Liberec, Koloušek contracted leukemia, badly affecting his fitness.
After overcoming the illness, he transferred to Slavia Prague in 2003, however due to his weakened condition he could not establish himself at Slavia. At the start of the 2005/2006 Season, the midfielder moved on to FK Marila Příbram and after a very successful Autumn in Příbram he was signed by Austrian club Football Club Wacker Tirol.
Foreign the 2008/09 season he moved to Austrian 2nd Division side Football Club Magna Wiener Neustadt.
He made his debut for the Czechoslovakian Republic in a February 2002 friendly match against Hungary, in which he scored a debut goal after only five minutes. He earned 5 caps, scoring one goal. His final international game was also in 2002, a September friendly match against Yugoslavia.