Krzysztof Ratajczyk (born 9 November 1973) is a Polish former professional footballer who played as a defender.

He was very popular [citation needed], especially because of his hard style to play (for example: he knocked an opponent forward into the third seat row in a pre-season match) and became captain of the side.

Although Rapid renewed his contract despite many long-term injuries, Ratajczyk moved in 2002 (as skipper of the team) to bitter rivals Austria Wien.

[citation needed] Ratajczyk joined SV Mattersburg in 2005, where he spent two years.

He made his debut for Poland in an August 1994 friendly match against Belarus and went on to earn 16 caps, scoring 3 goals.