This book constitutes the thoroughly refereed proceedings of the 5th International Workshop on Programming Multi-Agent Systems, ProMAS 2007, held in Honolulu, HI, USA, in May 2007 as an associated event of AAMAS 2007, the 6th International Joint Conference on Autonomous Agents and Multiagent Systems.

The 11 revised full papers presented together with 2 invited articles address current issues in the areas of agent platforms, environment and interaction, agent programming languages, and analysis of MAS.