An electron emission apparatus includes a first plate sectioned according to sub-pixels and including an electron emission part, and a second plate opposite to the first plate and including a plurality of light emission regions in which electrons emitted by the electron emission part collide with a fluorescent material and a plurality of non-light emission regions. The content ratio of the boron nitride particles 2 is 35 vol % or more and the thermal conductivity in a direction perpendicular to a plane direction PD of the thermally conductive sheet 1 is 4 Wm\xb7K or more. When an object touches the capacitive touch device, it becomes capacitively coupled to the first electrode layer and the second electrode layer to generate a signal corresponding to the touched position.