A cartridge for aerosol inhaler comprising: a liquid reservoir that stores an aerosol-generating liquid; and a heat-generating sheet that is provided with a positive electrode and a negative electrode, and that atomizes the aerosol-generating liquid supplied from the liquid reservoir, by generating heat when a current flow is caused between the positive electrode and the negative electrode, wherein the heat-generating sheet is formed of a porous material, and an electric path connecting the positive electrode and the negative electrode includes a meandering electric path unit that is formed into a meandering shape by a plurality of slits linearly provided in the heat-generating sheet, the meandering electric path unit is formed by sequentially connecting a linear electric path portion having a linear shape and a bent electric path portion obtained by bending the linear electric path portion, the positive electrode is provided on a positive electrode-provided electric path unit that is connected to one end of the meandering electric path unit, and the negative electrode is provided on a negative electrode-provided electric path unit that is connected to the other end of the meandering electric path unit, the slits separating the linear electric path portions from one another are arranged in parallel at a fixed interval in the heat-generating sheet the linear electric path portions are separated from one another by an overlapping section where the adjacent slits overlap each other in an extension direction thereof, characterised in that a length dimension of the overlapping section is set to be equal to or larger than a distance dimension between the adjacent slits or the total length dimension of the overlapping section is set to be equal to or larger than a dimension of a straight line connecting the positive electrode and the negative electrode. a liquid reservoir that stores an aerosol-generating liquid; and a heat-generating sheet that is provided with a positive electrode and a negative electrode, and that atomizes the aerosol-generating liquid supplied from the liquid reservoir, by generating heat when a current flow is caused between the positive electrode and the negative electrode, wherein the heat-generating sheet is formed of a porous material, and an electric path connecting the positive electrode and the negative electrode includes a meandering electric path unit that is formed into a meandering shape by a plurality of slits linearly provided in the heat-generating sheet, the meandering electric path unit is formed by sequentially connecting a linear electric path portion having a linear shape and a bent electric path portion obtained by bending the linear electric path portion, the positive electrode is provided on a positive electrode-provided electric path unit that is connected to one end of the meandering electric path unit, and the negative electrode is provided on a negative electrode-provided electric path unit that is connected to the other end of the meandering electric path unit, the slits separating the linear electric path portions from one another are arranged in parallel at a fixed interval in the heat-generating sheet the linear electric path portions are separated from one another by an overlapping section where the adjacent slits overlap each other in an extension direction thereof, characterised in that a length dimension of the overlapping section is set to be equal to or larger than a distance dimension between the adjacent slits or the total length dimension of the overlapping section is set to be equal to or larger than a dimension of a straight line connecting the positive electrode and the negative electrode.