The invention provides a multilayer ceramic capacitor comprising a capacitor body composed by alternately layering dielectric layers and inner electrode layers, and each of the above mentioned dielectric layers contains a plurality of crystal particles, and grain boundary phases comprising interfacial grain boundaries and triple point grain boundaries formed among a plurality of the crystal particles adjacent to one another, and Si—Ba—O compound being formed in 5% or more of the triple point grain boundaries in the entire triple point grain boundaries per unit surface area of the dielectric layer. Accordingly, the multilayer ceramic capacitor has high relative permittivity and is high the temperature property and highly accelerated life test property.