In world, India is also one of the largest coal-producing countries. India contains substantial coal reserves of Gondwana and Tertiary sedimentary basins. Coalbed Methane (CBM) is methane gas adsorbed in the coal surface. The methane content in coal depends on parameters like coal composition, rank, ash, moisture and volatile matter. Coal seam depth and its thickness with other geologic factors play vital role in generation and storage of CBM. The main objective of the work is to make the readers understand the basic concepts and preliminary ideas related to CBM exploration.