Chabbra, 65, breathed his last at 4:30 AM, Additional Superintendent of SMS Hospital, Ajit Singh told PTI.
He was in a coma for the past couple of days and put on ventilator support, Singh said.
In a statement here, former Chief Minister Ashok Gehlot said the anti-liquor crusader died due to the "insensitive" attitude of the Rajasthan government.
"Had Rajasthan Chief Minister tried to meet him and persuaded him to end fast, Chabbra might have been saved," Gehlot said.