The lawyer for Finks bikie gang member Troy Mercanti has argued in the Supreme Court that his client should be immediately released from prison.

Mercanti's two year and four month sentence for assault ended last month but he is still behind bars over another charge.

Last year, a District Court judge sentenced Mercanti to four months jail for refusing to answer questions at an Australian Crime Commission inquiry in 2009.

The judge initially ordered that Mercanti could serve the two sentences together but the decision was later changed to have them served cumulatively.

Mercanti's lawyer Laurie Levy SC has argued that the decision was wrong and his client has done his time.

The Court of Appeal has reserved its decision.

Posted in The lawyer for Finks bikie gang member Troy Mercanti has argued in the Supreme Court that his client should be immediately released from prison.