This book constitutes the proceedings of the 38th European Conference on§IR Research, ECIR 2016, held in Padua, Italy, in March 2016.§The 42 full papers, 28 poster papers. $ workshops and 4 tutorials papers and 6 demonstrations presented§together with 3 keynotes in this volume were carefully reviewed and§selected from 284 submissions.§§ ECIR provides a wide range of folliwjng topics: social context and news, machine learning, question answering, ranking, evaluation methodology, probalistic modeling, evaluation issues, multimedia and collaborative filtering and many more.§§ Additionally, ECIR 2016 hosted 4 tutorials and 4 workshops covering a range of information retrieval topics. The workshops were: - 3rd International Workshop on Bibliometric-enhanced Information Retrieval (BIR2016); -1st International Workshop on Modeling, Learning and Mining for Cross/Multilinguality (MultiLingMine 2016); -ProActive Information Retrieval: Anticipating Users' Information Needs (ProAct IR); -1st International Workshop on Recent Trends in News Information Retrieval (NewsIR'16). The following ECIR 2016 tutorials were selected: - Collaborative Information Retrieval: Concepts, Models and Evaluation; - Group Recommender Systems: State of the Art, Emerging Aspects and Techniques, and Research Challenges; - Living Labs for Online Evaluation: From Theory to Practice (LiLa2016); - Real-Time Bidding based Display Advertising: Mechanisms and Algorithms (RTBMA 2016).