Additional Chief Judicial Magistrate Sougata Roy Chowdhury passed the order after Mitra's counsel pressed for bail contending the CBI investigation into the scam has yielded "no fruitful result".
Mitra, former state transport minister who was arrested on December 12, 2014, had surrendered before the court after his bail was cancelled by the Calcutta High Court on November 20.
The TMC leader's counsel said there has been a "change of circumstance" in the case and CBI's influential tag on Mitra does not stand after his resignation as the state transport minister in November and hence he be granted bail.
Mitra's frail health condition was another reason why he be granted bail, his counsel said.
More From This Section
(Reopens LGC1)
Meanwhile, former Union minister Matang Sinh, who could not be produced before the court because of his health condition, was also remanded in judicial custody till January 14.
The court also ordered setting up of a medical board, comprising doctors from the state-run SSKM Hospital, Bangur Hospital and the Jail Hospital, to review the former minister's health condition, on his counsel's request.
The court allowed Ghosh to consult his personal doctor on gastric and back pain problems.