2D material are materials whose characteristics are different from the one in 3D materials. That is the fact in the thermal properties that are different that the ones in 3D materials. That provides a new range of properties that can have applications like thermal isolation or electricity generation by Seebeck effect. The goal of this thesis was to find the thermal conductivity of 2D materials . On this work, Raman spectroscopy was used in order to determine different characteristics on 2D materials ( concentration, stress, temperature ). A Joule heating on 2D materials was performed in order to observe thermal gradiant in our material to access to the thermal conductivity of our material.