Three-point bending breaking force for ventral and dorsal side of brown rice was measured individually. Average kernel breaking force (the force required to break a brown rice kernel in three-point bending) between ventral side and dorsal side were different, and kernel-to-kernel breaking force distributions were also quite different. The breaking force distribution for ventral side tended to be multi-peak, but that for dorsal side tended to be single-peak. The bending breaking strength and elastics modulus for ventral side were more than those for dorsal side, but the fracture energy for ventral side was less than that for dorsal side. On the other hand, the rice processing quality indexes were correlated to the mechanical properties of rice.