Recently, patents for electonic business model are growing rapidly. It relates that personal computers and internet are popularized in our life. Business model produces a profit, and gives business chance for small companies with ideas of business form. Inventors who produce a new business model for patent, must research if similar types are existing, but this task is a full of toil. Thus, inventors need an efficient researching method. In this paper, existing patents for electonic business model are classified by Cluster analysis.