The heat of combustion released during char oxidation can influence the different cigarette properties, such as burning rate and smoke formation. Heat emission of burning cigarettes has been studied to estimate the heat transfer rates during cigarette smoking. Heat flux around a burning cigarette for each position was determined by measurement with various sensors. Heat emission from the periphery and/or end of the cigarette was measured with heat flux sensors. The temperature of the solid phase was measured by an infrared thermometer in conjunction with an optical fiber. Heat of radiation, heat of convection and heat of conduction could be evaluated separately. Heat balance of the burning cigarette has been discussed. It was considered that total heat evolved in the cigarette should be larger than combustion heat of tobacco char. Most of the heat is given off to the vicinity of the cigarette, especially as heat of radiation from the surface of the cigarette paper ash. A small quantity of heat is conducted through the tobacco column.