Tomáš Janu (born 17 September 1973 in Príbram) is a former Czech footballer.
He was able to play either left back or left defensive midfielder.
Janu was the longest serving player in the club of FC Slovan Liberec (over 350 starts).
He was also the team captain.
In summer of 2010 he moved to FK Ústí nad Labem on loan.
He ended professional career on 1 June 2013 in FC Slovan Liberec together with his teammate Zbynek Hauzr.