This book constitutes the refereed proceedings of the38th European Conference on IR Research, ECIR 2016, held in Padua, Italy, in March2016.

The 42 full papers and 28 poster papers presentedtogether with 3 keynote talks and 6 demonstration papers, were carefullyreviewed and selected from 284 submissions. The volume contains the outcome of4 workshops as well as 4 tutorial papers in addition. Being the premierEuropean forum for the presentation of new research results in the field ofInformation Retrieval, ECIR features a wide range of topics such as: socialcontext and news, machine learning, question answering, ranking, evaluationmethodology, probalistic modeling, evaluation issues, multimedia andcollaborative filtering, and many more.