It is an important theme to find an underlying law of pattern formation in living system. Our aim lies in answering question whether the law is similar to or quite different from physical laws. If they are similar, there can be an analogy between the both. Further methods in non-equilibrium physics will be available to the study and it is, however, necessary to understand the limitation in biological system. Here we present Horii's scheme for the study of biological pattern formation with one-dimension as an example of dental arch in human mandible.