To provide an ammonia release unit efficiently releasing ammonia occluded in an ammonia occlusion material, a method for releasing ammonia, and an exhaust gas cleanup unit using the same.

This ammonia release unit 16 includes a powder-form ammonia-occluding material P which releases occluded ammonia by raising temperature and a conductive paste Q which is conductive and non-reactive with ammonia, and equipped with a mixture R of the ammonia occluding material P and the conductive paste Q, a container 27 which accommodates the mixture R and a pair of electrodes 21 to apply a voltage to the mixture R accommodated in the container 27.