But his close business associate Giasuddin-Al-Mamun has been sentenced to seven years in prison and fined Tk 400 million for complicity in the money laundering case.
Md Motahar Hossain of the Special Judges' Court-3 pronounced the verdict on Sunday.
BNP's senior Vice-Chairman Tarique Rahman was not present as he has been living in London since 2008 after securing a bail from the Supreme Court.
Khaleda's younger son, Arafat Rahman Coco, was also charged with money laundering.
He has already been handed down a six-year imprisonment in the case after a trial in absentia.
Mamun was brought to the court room from the prison around 9.30am amid tight security.
bdnews24.com's Prokash Biswas reported from the courtroom that Mamun, wearing an off-white cotton shirt was sitting with his eyes closed.
But Mamun refused to comment after the verdict was given.
His defence counsel said though Tarique got justice but Mamun did not.
But he hoped Mamun would be released soon as he's been in jail for almost seven years now.
Plaintiff lawyers, however, refused to comment.
Chief Counsel of the Anti-Corruption Commission (ACC) Anisul Haque told reporters, "We are certainly not satisfied with the verdict. I won't say anything else before reading the full verdict."
Defence counsel started celebrating in the courtroom soon after the verdict was given.
That was followed by a pro-BNP lawyers' procession in the court premises.
The Judge started to read the verdict just before 12pm.
At first the verdict for Giasuddin-Al-Mamun was read out.
Then the Judge acquitted Tarique Rahman and went to his private chamber immediately.
State counsels were clearly unhappy with the verdict. "We don't accept this verdict," one of them was heard saying.