Iqbal Yusuf Shaikh, sentenced to death by the TADA court in the 1993 Mumbai serial blasts case, passed away at a Pune hospital, his lawyers said on Tuesday.
He had been sentenced for parking an explosive-filled scooter in Naigaum, Central Mumbai, which did not explode.
The exact time of his death was not yet known but he was admitted to Sassoon hospital in Pune and was sufferring from TB, advocate Subhash Kanse said.
In his late thirties, Iqbal was also suffering from mental derangement.
He is the second convict to die after the sentencing.
Earlier, in June gangster Ijaz Pathan died after a long illness in Mumbai hospital.
A total of 100 accused were convicted by the court for the blasts that ripped through the city on March 12, 1993, claiming 257 lives.