There is provided a multilayer ceramic electronic component including a ceramic body having internal electrodes formed therein, external electrodes formed on external surfaces of the ceramic body and connected to the internal electrodes, and a buffer layer formed on surfaces of contact between the internal electrodes and the external electrodes among external surfaces of the ceramic body, in an interior direction of the ceramic body, wherein when a thickness of the external electrode is denoted by T, a thickness of the buffer layer is denoted by t, a thickness of an active region is denoted by TA, and a thickness of the ceramic body is denoted by Tc, T≦10 μm, TA/TC>0.8, and t≦5 μm, so that a multilayer ceramic electronic component having excellent reliability may be realized.