An aerosol inhalator containing has an inner tube forming part of a suction path, a capillary tube extending within the inner tube and configured to discharge a solution therefrom in conjunction with a user's inhalation, and a heater extending in a direction perpendicular to the axis of the inner tube so as to traverse the inner tube and configured to receive the solution discharged from the capillary tube, wherein the heater atomizes the received solution by heating to generate, inside the inner tube, an aerosol to be inhaled by the user.