The carcass was found at an isolated stretch near Pipariya Bhood village in Bhira range of the division, said PP Singh, Deputy Director, Dudhwa Tiger Reserve.
Kishanpur Wildlife Sanctuary is a part of Dudhwa Tiger Reserve.
Some villagers noticed the carcass when they went to the field, Singh said adding he rushed to the spot to inspect it.
Divisional Forest Officer (South Kheri) Neeraj Kumar told PTI all vital organs including nails and jaws of the tiger have been found intact which rule out poaching apprehensions.