This book contains the proceedings of the 11th Scandinavian Conference on Artificial Intelligence (AI), held in Trondheim in May 2011. It presents 17 full papers and an additional six short papers and posters carefully selected from the submissions after thorough peer review. The papers are arranged in four main sections: machine learning, planning, application of AI and robotics and cognition. Topics covered in the first section include: performance user-centered qualities generated by supervised learning algorithms; parallel implementation of the random forests algorithm and a spatial cluste.