Business process modelling is one of the most important steps in business process re-engineering. An analysis of business process usually starts with the description of the process in natural languages and ends wiith diagram for profesional communication or computarization. There has been little research into the development of comprehensive method to provide full support to the analyst in the course of business process modelling. This articles proposes an approach which is a synthesis of natural language, semantic networks, and objects. An example is used to demonstrate that the proposes approach is an effective method of tranforming natural language description into object-oriented diagrams via the application of semantic networks.