Vitamin D3 (VitD) has several biological activities and some studies demonstrate its possible correlation with better prognosis in COVID-19 disease. The Sars-CoV-2 or new coronavirus is responsible for the current and serious pandemic of COVID-19. One of the main proteins involved in the infection process of the host cell is the Spike protein and its blocking could have preventive and therapeutic actions. The objective of this work was to verify the ability of binding, through molecular docking, VitD with the Spike protein. Docking performed with AutoDockVina demonstrated that the binding between VitD and Spike occurs with a binding energy of -7.1 Kcal/mol and through 12 hydrophobic connections. So, at the molecular level, VitD's interaction with Spike could inhibit this viral protein and act as an Anti-Sars-CoV molecule. To confirm this evidence demonstrated by the docking, it is necessary to continue the studies in vitro and in vivo.