A photoacoustic imaging device includes a connector (11) that connects a light source device (20), a booster circuit (13) that includes a capacitor (13d) and that performs a boosting operation that applies voltage to the light source device (20) via the connector (11), a discharge circuit (15) connected to both poles of the capacitor (13d) of the booster circuit (13) and that performs a discharge operation that discharges a charge stored in the capacitor (13d), and a discharge circuit controller (16) that controls the discharge circuit to perform the discharge operation when the connector (11) and the light source device (20) are disconnected or when the power source of the photoacoustic imaging device main body is off.
