Presiding judge Tomas Kubec ruled that Randy Blythe's actions did not constitute the crime of causing an injury leading to death.
"We did not find criminal responsibility in the actions of the defendant," he said. "We found moral responsibility. There has been the death of a young man who had not been guilty of anything."
Kubec said the concert promoters were ultimately to blame for failing to prevent fans from clambering onto the stage.
"We reached the conclusion that there was a serious fault on the side of the promoter and organiser of the concert."
Prosecutors immediately appealed against the acquittal, meaning that the case will be reviewed by the Czech High Court.
Randy Blythe, singer of US metal band Lamb of God, was today acquitted of charges of causing the death of a fan.
He posted the above photograph shortly after the verdict of the court in Prague, along with the following message:
"I have been found not guilty & acquitted of all charges against me. I am a free man. This photo was taken by my friend@aceyslade- it says it all.
"Please remember the family of Daniel Nosek in your thoughts & prayers in this difficult time. I only wish for them peace. Thank you for your support- Randy."
A Czech court has acquitted the frontman of US heavy metal band Lamb of God, Randy Blythe, of charges he caused the death of a fan at a concert in Prague three years ago.
The prosecution had accused Blythe, 42, of causing the death of the 19-year old fan by pushing him off the stage at a 2010 concert.