The book "Swarm Intelligence in Data Mining" offers a comprehensive examination of the application of swarm intelligence in the field of data mining. It is based on the concept of swarm intelligence, inspired by biological phenomena such as swarms, herds, and flocks, and aims to solve optimization problems. Data mining, on the other hand, is an analytical process that investigates large datasets to identify consistent patterns and systematic relationships between variables. This textbook addresses the various challenges and approaches associated with the combination of these two disciplines. It includes a total of 11 chapters, including an introductory chapter that covers fundamental definitions and key research questions. The contributions come from leading experts in the field and provide both theoretical and practical perspectives.