AEROSOL INHALER CARTRIDGE AND AEROSOL INHALER

Provided are a metal heater for an aerosol inhaler that is an improvement over conventional heaters, an aerosol inhaler cartridge provided with same, and an aerosol inhaler. This aerosol inhaler cartridge is provided with a liquid storage unit for storing an aerosol generation liquid and a thin metal heater for atomizing the aerosol generation liquid supplied from the liquid storage unit. The metal heater has an obverse face, a reverse face opposite the obverse face, and a side face joining the obverse face and the reverse face, and is provided, on at least a part of the side face, with a tapered protrusion that protrudes in a tapered shape in a direction different from an imaginary line extending from the obverse face to the reverse face. The tapered protrusion has: a first tapered face formed in an inwardly curving manner extending from an obverse edge part whereat the obverse face and the side face are joined to the tip of the tapered protrusion; and a second tapered face formed in an inwardly curving manner extending from a reverse edge part whereat the reverse face and the side face are joined to the tip of the tapered protrusion.