This book, Introductory Plant Nematology, provides a comprehensive and well-structured account of plant-parasitic nematodes, integrating classical knowledge with modern scientific advancements. It systematically covers the fundamental aspects of nematology, including morphology, taxonomy, biology, and ecology, and progresses to detailed discussions on host–parasite interactions, mechanisms of infection, symptomatology, and diagnostic approaches. Special emphasis is given to economically important groups such as root-knot, cyst, lesion, burrowing, migratory endoparasitic, and ectoparasitic nematodes, along with their role as vectors of plant viruses. The book also incorporates recent developments in molecular biology, genomics, and proteomics, offering insights into the complex mechanisms of nematode parasitism and adaptation. The book is intended for a wide readership, including undergraduate and postgraduate students of agriculture, plant pathology, nematology, and allied disciplines. It will also serve as a valuable reference for researchers, academicians, extension workers, and professionals involved in crop protection, sustainable agriculture, and integrated pest management.