A multilayer ceramic electronic component includes: a capacitor body including a plurality of dielectric layers and a plurality of internal electrodes; with external electrodes disposed on the capacitor body and electrically connected to the internal electrodes, wherein the capacitor body includes an active region in which internal electrodes having different polarities from each other overlap each other to form capacitance, and a margin part defined as region except for the active region. A concentration of an additive element in the margin part is higher than the concentration of the additive element in the active region, and the margin part has a concentration gradient of the additive element from a surface of the capacitor body toward the active region.