As XML has been used as a markup language for standard documents in various areas, it requires an XML editing tool which writes XML documents easily and presents the style of documents. Therefore, many companies have developed XML editing tools and have released the products. However, it is hard for beginners to write XML documents using such tools. In this paper, we design and implement an XML editor based on WYSIWYG(What You See Is What You Get) that beginners as well as exports can use easily. Our XML editor allows beginners to write easily XML documents and style documents. We also integrate our XML editor with the XML repository system developed in our laboratory.