Jacek Krzynowek is a Polish international football player who currently features for the German Bundesliga club Hannover 96. He plays as a midfielder.
Jacek Krzynowek commenced his professional club football career at RKS Radomsko in 1994 and played for them for two seasons. He subsequently went onto play for Rakow Czestochowa, GKS Bełchatow, 1. FC Nuremberg and Bayer Leverkusen.
Krzynowek was signed by VfL Wolfsburg in 2006 and played for them for two seasons. He scored 7 goals in 55 league matches for them. In 2009 he was signed by Hannover 96.
Jacek Krzynowek made his international debut for Poland on November 10, 1998 against Slovakia in a 3-1 win and made over 90 international appearances for his nation.