Thesauri have been widely used in bibliographic databases for 30 years. Recently, CD-ROMs of a variety of dictionaries with their GUIs are spreaded to current users. On the other hands, End users dose not use thesauri as for their bulky printed matter. The kind of software browsing graphically and managing thesauri does not appear in PC environment. The browsing tool for lexical database with hierarchical structure has been developed using Java.. This paper describes the functions, the components, and examples of its usage. The problems of the browser and the functions to be extended are discussed.