garnered more than 103,000 signatures.
Awarding Manning the prize would, the organisation said, clear "the cloud (that) hovers over the Norwegian Nobel Committee" for awarding the prestigious honour to US President Barack Obama in 2009.
Two months after the announcement and one week before Obama accepted the award, he decided to intensify the war effort in Afghanistan.
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"No individual has done more to push back against what Martin Luther King Jr. called 'the madness of militarism' than Bradley Manning," the petition read.
"And right now, remaining in prison and facing relentless prosecution by the US government, no one is more in need of the Nobel Peace Prize," it said.
A US military court found Manning, 25, guilty of 20 of the 22 charges of spying and disobeying orders lodged against him for having handed a large quantity of secret military reports and US diplomatic cables to WikiLeaks, the anti-secrecy website founded by Julian Assange.
Manning faces up to 90 years in prison.
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According to US journalist Norman Solomon, one of the organisers of the petition, awarding the soldier the Nobel would underline the important role played by whistleblowers in promoting peace and democracy.
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"Unless we can speak the truth, then peace-making becomes a hollow exercise of rhetoric rather than reality," Solomon told reporters before handing over the 5,000-page document to the Nobel Institute.
The chairman of the Institute, Geir Lundestad, has in the past said that such campaigns do not influence the Nobel Committee in its choice.
The 2013 winner of the Nobel Peace Prize will be announced on October 11 in Oslo.
Denouncing what he called "a normalisation of perpetual war", Solomon, a former Obama supporter, said giving Manning the Nobel would restore some of the prize's cachet after it was awarded to the US leader.
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