Neutrino observation has become more and more competitive in the recent years with detectors such as IceCube. Thus, it now makes sense to determine where the detected neutrinos originate from. We determine the Galactic diffuse neutrino flux by employing a parametrisation of the neutrino production in the collisions of cosmic rays and gas in our Galaxy. Then, we calculate the resulting neutrino flux at Earth. Comparing the calculated diffuse neutrino flux to the neutrinos measured by the IceCube detector, we determine that around 4% of the measured neutrinos can be explained by the diffuse neutrino flux.