A power supply unit for an aerosol inhaler includes: 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. The power supply unit further includes: a conductor which electrically connects the connector and the control device； a capacitor provided between the connector and the control device so as to be connected in parallel with the control device； a first circuit board on which the connector is provided； a second circuit board which is apart from the first circuit board and on which the capacitor and the control device are provided； and a conductive member which electrically connects the first circuit board and the second circuit board.
