A dome switch assembly that can reduce the SAR value and improve radiation performance of a mobile communication terminal and a mobile communication terminal having the same are provided. The ground layer of the dome switch assembly is connected to a hinge by a hinge contact unit. The hinge contact unit extends through a groove formed in the ground layer towards the inside area of the ground layer and is connected to a bottom surface of the groove. The position and length of the connection of the hinge contact unit to the ground layer may be adjusted so that the SAR value can be reduced and radiation performance can be improved.