POWER SOURCE UNIT FOR INHALATION COMPONENT GENERATION DEVICE

A power supply unit on an inhalation component generation device includes a power supply, a first resistor that is connected to the power supply, a second resistor that is connected in series to the first resistor, a connection part that is electrically connectable to an external unit, the connection part including a first electrical terminal that is electrically connected to a first node between the first resistor and the second resistor, and a second electrical terminal that is electrically connected to a second node disposed at a side opposite to the first node with respect to the first resistor, a first switch that is electrically connected to the first node and forms an electrical path electrically parallel with the second resistor, and a detecting part that detects connection of the external unit to the connection part based on a voltage drop amount in the second resistor. The first switch is maintained in an open state when the external unit is not connected to the connection part. The first switch includes a parasitic diode so that a flowing direction of a current output from the power supply that flows into the first switch through the first node is a reverse direction when the external unit is not connected to the connection part. An electrical resistance value of the second resistor is lower than the electrical resistance value of the first resistor.