A flavor inhaler including an aerosol source being a columnar article having a column-like shape and a heater assembly configured to atomize the aerosol source; the heater assembly further comprising: an atomization chamber extending along a predetermined direction to form at least part of an aerosol channel through which aerosol passes, the aerosol being generated when the aerosol source is heated by the heater assembly, and an intake channel (81 to 84) configured to supply air from an inlet to the atomization chamber, the intake channel (81 to 84) including: a first channel extending in the predetermined direction and leading to the inlet; a second channel extending from the first channel along an intersecting direction intersecting with the predetermined direction as viewed in a section of the heater assembly along the predetermined direction, and a third channel extending from the second channel in the predetermined direction wherein the inlet is provided side by side in the intersecting direction with an outlet from which the aerosol is guided out, wherein the flavor inhaler further comprises a collar member including a hollow space that forms at least part of the aerosol channel, and characterized in that at least part of the second channel is formed by an outer lateral face of the columnar article with the columnar article inserted in the atomization chamber. an atomization chamber extending along a predetermined direction to form at least part of an aerosol channel through which aerosol passes, the aerosol being generated when the aerosol source is heated by the heater assembly, and an intake channel (81 to 84) configured to supply air from an inlet to the atomization chamber, the intake channel (81 to 84) including: a first channel extending in the predetermined direction and leading to the inlet; a second channel extending from the first channel along an intersecting direction intersecting with the predetermined direction as viewed in a section of the heater assembly along the predetermined direction, and a third channel extending from the second channel in the predetermined direction wherein the inlet is provided side by side in the intersecting direction with an outlet from which the aerosol is guided out, wherein the flavor inhaler further comprises a collar member including a hollow space that forms at least part of the aerosol channel, and characterized in that at least part of the second channel is formed by an outer lateral face of the columnar article with the columnar article inserted in the atomization chamber. a first channel extending in the predetermined direction and leading to the inlet; a second channel extending from the first channel along an intersecting direction intersecting with the predetermined direction as viewed in a section of the heater assembly along the predetermined direction, and a third channel extending from the second channel in the predetermined direction wherein the inlet is provided side by side in the intersecting direction with an outlet from which the aerosol is guided out, wherein the flavor inhaler further comprises a collar member including a hollow space that forms at least part of the aerosol channel, and characterized in that at least part of the second channel is formed by an outer lateral face of the columnar article with the columnar article inserted in the atomization chamber.