In the pages of this book, we explore the fascinating world of soil macroorganisms and their impact on the genesis and evolution of this vital resource. From the rearrangement of materials to the formation of organo-mineral complexes, each aspect is analyzed in detail, highlighting the importance of these organisms in soil transformation and the promotion of biodiversity.My goal with this work is to contribute to the knowledge and appreciation of Pedobiology, highlighting how soil organisms play a crucial role in the provision of a wide range of ecosystem services, fundamental for the balance and health of our natural ecosystems.It is relevant to highlight that "Pedobiology" represents the first text dedicated to this topic in our country. This milestone reflects the commitment of our scientific community to explore and understand fundamental aspects of our local ecosystems.