To provide a balloon catheter that enables a minimally invasive and effective pulmonary emphysema treatment. The balloon catheter includes: a first balloon that has at least a part of an external surface thereof come into contact with a biological tissue when expanded in living body a second balloon expandable and contractible separately from the first balloon a main body portion having a first lumen through which a fluid for expanding the first balloon can circulate and a second lumen through which a fluid for expanding the second balloon can circulate and supply portions that supply the first balloon with an adhesive material for adhering the external surface of the first balloon to the biological tissue.
