The Poland international has been at Signal Iduna Park for six years and played a leading role in their two recent Bundesliga wins - in 2011 and 2012 - as well as their remarkable run to last season's Champions League final.
|12/1||Manchester City are 12/1 with Coral to win the Champions League
"Dortmund simply had the advantage over Manchester City," 'Kuba' told Polish newspaper Przeglad Sportowy.
"We have a great squad, fantastic manager, incredible supporters and a very bright future ahead of us.
"In Dortmund, me and my family have everything we need. I did not pursue interest from other clubs in my services."
Blaszczykowski has made over 200 appearances for Dortmund since his arrival from Wisla Krakow in February 2007, scoring 29 goals.