BCCI president Jagmohan Dalmiya died last night at a hospital in Kolkata, where he had been admitted after suffering a heart attack on Thursday.
He was 75 and had faced concerns around his health since starting his second term as president in March.
Dalmiya had been admitted to hospital after complaining of chest pain on Thursday and had to have an angiography.
He was reported to be stable but remained in critical care for the next two days.
The hospital statement said his condition had become unstable last morning and he died at 8.45 pm.
Dalmiya's body will be taken to the Cricket Association of Bengal headquarters at Eden Gardens this afternoon for the public to pay their respects.