An aerosol-generating article comprising: a tobacco rod; a filter rod located downstream of the tobacco rod; and a wrapper surrounding outer circumferential surfaces of the tobacco rod and the filter rod, wherein the filter rod comprises: a structure supporting the wrapper in a transverse direction; and at least one channel formed between the wrapper and the structure, wherein the structure comprises a plurality of support surfaces (234, 234-1, 234-2, 234-3, 234-4) contacting an inner circumferential surface of the wrapper in a longitudinal direction, wherein the structure further comprises a plurality of plates (232-1, 232-2, 232-3, 232-4) extending from a longitudinal axis to the inner circumferential surface of the wrapper, and wherein an angle formed by two adjacent plates of the plurality of plates (232-1, 232-2, 232-3, 232-4) is 180/n, n being a positive integer; or wherein the structure comprises at least one support surface spirally contacting an inner circumferential surface of the wrapper in a longitudinal direction, wherein the at least one channel comprises a channel for forming a vortex of aerosol around a longitudinal axis, wherein the structure further comprises a spiral plate member spirally formed along the longitudinal axis, and wherein the structure further comprises a hollow formed along the longitudinal axis. a tobacco rod; a filter rod located downstream of the tobacco rod; and a wrapper surrounding outer circumferential surfaces of the tobacco rod and the filter rod, wherein the filter rod comprises: a structure supporting the wrapper in a transverse direction; and at least one channel formed between the wrapper and the structure, wherein the structure comprises a plurality of support surfaces (234, 234-1, 234-2, 234-3, 234-4) contacting an inner circumferential surface of the wrapper in a longitudinal direction, wherein the structure further comprises a plurality of plates (232-1, 232-2, 232-3, 232-4) extending from a longitudinal axis to the inner circumferential surface of the wrapper, and wherein an angle formed by two adjacent plates of the plurality of plates (232-1, 232-2, 232-3, 232-4) is 180/n, n being a positive integer; or wherein the structure comprises at least one support surface spirally contacting an inner circumferential surface of the wrapper in a longitudinal direction, wherein the at least one channel comprises a channel for forming a vortex of aerosol around a longitudinal axis, wherein the structure further comprises a spiral plate member spirally formed along the longitudinal axis, and wherein the structure further comprises a hollow formed along the longitudinal axis. a structure supporting the wrapper in a transverse direction; and at least one channel formed between the wrapper and the structure, wherein the structure comprises a plurality of support surfaces (234, 234-1, 234-2, 234-3, 234-4) contacting an inner circumferential surface of the wrapper in a longitudinal direction, wherein the structure further comprises a plurality of plates (232-1, 232-2, 232-3, 232-4) extending from a longitudinal axis to the inner circumferential surface of the wrapper, and wherein an angle formed by two adjacent plates of the plurality of plates (232-1, 232-2, 232-3, 232-4) is 180/n, n being a positive integer; or wherein the structure comprises at least one support surface spirally contacting an inner circumferential surface of the wrapper in a longitudinal direction, wherein the at least one channel comprises a channel for forming a vortex of aerosol around a longitudinal axis, wherein the structure further comprises a spiral plate member spirally formed along the longitudinal axis, and wherein the structure further comprises a hollow formed along the longitudinal axis.