Disclosed is an engine mount for a vehicle including a membrane, which is an essential component of an engine mount for supporting a powertrain of the vehicle. The membrane may be deformed vertically and radially depending on an input amplitude so as to open or close bypass holes in upper and lower plates depending on the input amplitude. As such, it is possible to easily fulfill a function of isolating vibrations generated by the powertrain during idling and a damping function of controlling the behavior of the powertrain during traveling and it is possible to prevent the generation of abnormal noise attributable to cavitation and rattling phenomena.