PROBLEM TO BE SOLVED: To provide an apparatus for maintaining the freshness of an agricultural product capable of maintaining the freshness of the agricultural product, and a method for maintaining the freshness of the agricultural product. An agricultural product freshness maintaining device according to an embodiment is a light source that irradiates an agricultural product with light including light in a near-infrared region and light in an ultraviolet region; a lighting circuit that applies a pulse voltage to the light source. And; a controller that controls the lighting circuit; The light source is a tubular arc tube; a pair of electrodes provided facing the internal space of the arc tube; a discharge medium enclosed in the internal space of the arc tube; and outside the arc tube. It has a trigger electrode provided; The lighting circuit is electrically connected to one of the pair of electrodes and the trigger electrode. [Selection diagram] Fig. 1
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