An inhalation component generating device includes: a power supply； a load that evaporates or atomizes an inhalation component source by power from the power supply； and a control circuit that performs control based on an output of a temperature sensor. The control circuit performs: a process (a) of calculating power supply temperature on the basis of the output of the temperature sensor； and a process (b1) of determining whether the power supply temperature is in a first temperature range, and performing deterioration diagnosis on the power supply only in a case where the power supply temperature is in the range.
