Muslim cleric Abu Bakar Bashir has appealed to Indonesia's Supreme Court to overturn his conviction and 30-month jail term for involvement in the 2002 Bali nightclub bombings.

Bashir's lawyers argued that a high court decision last month confirming the sentence handed to him by a lower court was reached on the basis of false evidence.

Attorney Achmad Michdan told reporters on Tuesday that a police report alleging a conversation between convicted Bali bomber Amrozi and the 66-year-old cleric was made up.

"The statement that Abu Bakar Bashir is behind the Bali bombing was based on Amrozi's dossier which was untrue. Amrozi has informed us the content did not match the reality," said Michdan.

Bashir's lawyers have claimed since the start of his trial late last year that the police dossier was fabricated.

Authorities have said Amrozi, now on death row in a Bali prison, refused to testify in person during Bashir's trial.

Bashir is accused by authorities in Indonesia, the world's most populous Muslim nation, and by some foreign governments of leading the al-Qaeda-linked Jemaah Islamiah network operating in South-East Asia. The Bali bombings killed 202 people, among then 88 Australians.

A court jailed Bashir for 30 months but acquitted him of charges that he led Jemaah Islamiah, ordered the Bali bombings or was involved in a 2003 blast at Jakarta's JW Marriott Hotel that killed 12 people.

The March 3 verdict prompted Australia and the United States to call for a review on the grounds the sentence was too lenient.