This book has been written as a reference book covering different units and their sub-units of Research Methodology in Language Education. It has four units written in simple language so that the readers of the book can take advantage of it. Unit one deals with the basic concepts of research or theoretical concept of research. This unit primarily covers meaning, definition, characteristics of research, its purposes, variables, sampling procedure, sources and tools of data collection and different ways of analyzing the data. Second unit of this book deals with different types of research designs based on the various criteria. Third unit covers with different phases of research activities. It also deals with different operational levels in research. Lastly, last unit discusses the practical ideas/guidelines for preparing a research proposal and thesis writing. Beside these four units, it also has chapter wise subjective and objective questions along. This book will be beneficial for any persons who are interested to build up confidence in research methodology.