Grains in the BaTiO3, which is used for a dielectric layer in MLCC(Multi-Layer Ceramic Capacitor) are necessaryto form core/shell structure for a stable TCC(Temperature Coefficient of Capacitance) behavior. The shell property has beendeduced from the whole TCC behavior of core/shell structure due to its tiny size, ~ few m. This study demonstrates theindividual TCC behavior of the shell phase measured by micro-contact measurement in a temperature range between 35and 135oC. Pt electrode pairs deposited on an enlarged core/shell structure in a diffusion couple sample made the measurementpossible. As a result, the DPT (Diffusion Phase Transition) behavior of the shell phase was revealed as a different TCCbehavior from that of the core: a broad peak with Tm at 65oC. This would be also useful experimental data for a modellingthat depicts dielectric-temperature behavior of core/shell structure.