Inferior alveolar nerve block (abbreviated to IANB, and also termed inferior alveolar nerve anesthesia or inferior dental block) is a nerve block technique which induces anesthesia (numbness) in the areas of the mouth and face innervated by one of the inferior alveolar nerves which are paired on the left and right side.

The inferior alveolar nerve block (IANB) is one of the most common and important procedures in dentistry and has widespread applications in all fields of dentistry including oral surgery, endodontics, periodontics, and prosthodontics.