This book constitutes the thoroughly refereed post-proceedings of the Second Workshop of Central and Eastern Europe on Multi-Agent Systems, CEEMAS 2001, held in Cracow, Poland, in September 2001.The 33 revised full papers presented together with two invited papers were carefully selected during two rounds of reviewing and improvement. The papers address:- organizational and social aspects of MAS;- communication languages, protocols, and negotiation;- applications of MAS in various fields;- agent and multi-agent development tools;- theoretical foundations of DAI;- learning in MAS.