The Editors are pleased to present this collection of 10 articles under the theme soil–structure interaction (SSI). The terminology SSI implies that an action from the surrounding ground would result in a reaction to the structure and vice versa, hence the interdependency of geotechnical engineering and structural engineering. This book immerses its readers into the specialized fields of (i) Soil and rock characterization (two articles); (ii) Ground improvement (two articles); (iii) Pavement engineering (one article); (iv) Shallow foundation (one article); (v) Deep foundation (two articles); (vi) Deep excavation (one article); (vii) Earthquake engineering (one article).