The three-phase separated morphologies on binary blends of core-shell polymer microsphere/diblock copolymers (lamellar and spherical morphologies in thermal equilibrium) were studied in two-dimensional aspects using transmission electron microscopy. Ordering rule on these binary blends depended strongly on the blend ratio and the molecular weight of diblock copolymers. New three-phase separated structure in which diblock copolymers were arranged as a honeycomb-like bilayer around the ordered microspheres, appeared by these blendings.