Recently, biological superior information processing ability has been researched to be able to be useful For a computer System. In particular, neural networks for the brain and nervous system have been researched. Immunity network models based on the biological immune response network also have been studied, but most of the researchers consider only it basic part of the interaction between B cells and T cells. Recent research has reported that the function of T cell receptors (TCR) is important in the practical immune response network. Therefore, we propose a new immunity network model which, unlike the traditional immunity networks, has the same function as that of a TCR. We applied the proposed immunity network model and the traditional immunity network model to the pattern recognition system. And we compared the performance of the proposed immunity network model with the traditional immunity network model, and showed the usability of the proposed immunity network model. (C) 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(10): 41-48, 2009; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/ecj.10040