The absolute neutrino mass scale plays an important role in cosmology, particles physics and astrophysics. The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at a direct and model independent determination of the neutrino mass with 0.2 eV (90% C.L.) sensitivity via ultrahigh precision measurements of the kinematics of tritium beta decay. It combines an ultra-luminous molecular windowless tritium source with a high resolution MAC-E-filter based spectrometer. This talk will report the neutrino mass measurement result from the first four-week science run of the KATRIN in spring 2019.