A multilayer ceramic electronic component may include a ceramic body including dielectric layers and internal electrodes, electrode layers connected to the internal electrodes, and a conductive resin layer formed on the electrode layers and including a first conductor, a second conductor containing carbon nanotubes, and a base resin. When the multilayer ceramic electronic component is heat-tested by raising a temperature of the multilayer ceramic electronic component from room temperature to about 900° C. at a rate of about 10° C./min, a weight of the multilayer ceramic electronic component decreases by about 0.33% to about 2.19%.