Stig Åvall Severinsen (Denmark) swam 72 m (236 ft 22in) under ice in Knudssø, Ry, Denmark, on 6 March 2010.
Stig managed to do the 72m swim in 1 minute and 26 seconds.
Please note: Comments below may relate to previous holders of this record.

Who: Stig Åvall Severinsen
What: Longest swim under ice - breath held
Where: Denmark
When: 16 Mar 2010
Stig Åvall Severinsen (Denmark) swam 72 m (236 ft 22in) under ice in Knudssø, Ry, Denmark, on 6 March 2010.
Stig managed to do the 72m swim in 1 minute and 26 seconds.
Please note: Comments below may relate to previous holders of this record.