Mads Glæsner (born 18 October 1988[1] in Tårnby) is a Danish swimmer.

[2] In June 2013, Glæsner was stripped of a gold and bronze medal from the 2012 World Short Course Championships after testing positive for levomethamphetamine.

[3] However, upon appeal to the Court of Arbitration for Sport, Glaesner's 1500-metre freestyle gold medal was reinstated based on the fact that a test after that race, two days after his initial positive test following the 400-metre free, was clean.

[4] Since then, he has competed at the 2016 Summer Olympics, in the 400 m freestyle.

This biographical article related to a Danish swimmer is a stub.