This booklet contains the proceedings of the workshop Modelling of  Objects, Components, and Agents (MOCA'01), August 27-28, 2001. The workshop is organised by the CPN group at the Department of Computer  Science, University of Aarhus, Denmark and the "Theoretical Foundations  of Computer Science" Group at the University of Hamburg, Germany. The papers are also available in electronic form via the web pages:  http://www.daimi.au.dk/CPnets/workshop01