A power supply unit for an aerosol inhaler, the power supply unit comprising: a power supply able to discharge power to a load for generating an aerosol from an aerosol source; a connector able to be electrically connected to an external power supply; and a control device (50, 13) configured to control at least one of charging and discharging of the power supply or configured to be able to convert power which is input from the connector into charging power for the power supply, wherein the power supply unit further includes: a conductor which electrically connects the connector and the control device (50, 13); and a capacitor (74, 75) which is provided between the connector and the control device (50, 13) so as to be connected in parallel with the control device (50, 13); wherein the power supply unit further comprises: a first circuit board on which the connector is provided; a second circuit board (77, 77b) which is apart from the first circuit board and on which the capacitor (74, 75) and the control device (50, 13) are provided; a conductive member which electrically connects the first circuit board and the second circuit board (77, 77b), and in that the first circuit board is provided on one end side of the power supply in a longitudinal direction, wherein the second circuit board (77, 77b) is provided on the other end side in the longitudinal direction, or the first circuit board is provided on one end side of the power supply in a width direction, wherein the second circuit board (77, 77b) is provided on the other end side in the width direction, and in that a resistance component of the conductor having the conductive member as a part thereof and the capacitor (74, 75) constitute a low pass filter, and a capacity of the capacitor (74, 75) is 1 μF or less. a power supply able to discharge power to a load for generating an aerosol from an aerosol source; a connector able to be electrically connected to an external power supply; and a control device (50, 13) configured to control at least one of charging and discharging of the power supply or configured to be able to convert power which is input from the connector into charging power for the power supply, wherein the power supply unit further includes: a conductor which electrically connects the connector and the control device (50, 13); and a capacitor (74, 75) which is provided between the connector and the control device (50, 13) so as to be connected in parallel with the control device (50, 13); a conductor which electrically connects the connector and the control device (50, 13); and a capacitor (74, 75) which is provided between the connector and the control device (50, 13) so as to be connected in parallel with the control device (50, 13); wherein the power supply unit further comprises: a first circuit board on which the connector is provided; a second circuit board (77, 77b) which is apart from the first circuit board and on which the capacitor (74, 75) and the control device (50, 13) are provided; a conductive member which electrically connects the first circuit board and the second circuit board (77, 77b), and in that a first circuit board on which the connector is provided; a second circuit board (77, 77b) which is apart from the first circuit board and on which the capacitor (74, 75) and the control device (50, 13) are provided; a conductive member which electrically connects the first circuit board and the second circuit board (77, 77b), and in that the first circuit board is provided on one end side of the power supply in a longitudinal direction, wherein the second circuit board (77, 77b) is provided on the other end side in the longitudinal direction, or the first circuit board is provided on one end side of the power supply in a width direction, wherein the second circuit board (77, 77b) is provided on the other end side in the width direction, and in that a resistance component of the conductor having the conductive member as a part thereof and the capacitor (74, 75) constitute a low pass filter, and a capacity of the capacitor (74, 75) is 1 μF or less.