The 86-year-old Congress leader had been suffering from various ailments, sources in Medanta Medicity said.
He is survived by his wife, two sons and a daughter. Born on 30 July, 1927, the Jat leader represented the Jhunjhunu constituency of Rajasthan and was a member of the
Rajasthan Legislative Assembly from 1957 to 1990, and from 1980 to 1990 he was a cabinet minister in the Government of Rajasthan.
He was Union Minister of State for Chemicals and Fertilizers (Independent Charge) from 1996 to 1997 and Union Minister of State for Water Resources (Independent Charge) from 1997 to 1998.
He was Union Cabinet Minister of Labour and Employment from May 23, 2004 to November 27, 2004 and was Union Cabinet Minister of Mines in the Manmohan Singh's government. His son Bijender Ola is a MLA from Jhunjhunu and was a former minster in the Rajasthan government.
A recipient of the Padma Shri award in 1968, Ola started girls education in a remote area in rural Rajasthan with three girls in the school known as Indira Gandhi Balika Niketan Ardawata in 1952.