Device and method for treating culture product and device for purifying culture product

Provided are a device for treating a culture product and a method for treating a culture product, whereby a virus inactivation treatment can be efficiently carried out as a substitute for a conventional low pH treatment. Also provided is a purification device for a culture product that comprises the device for treating a culture product. The device (3) according to the present invention for treating a culture product comprises: a flat channel (5) provided with an inlet port (5b) and an outlet port (5c) through which a liquid culture medium, said liquid culture medium being free from cells and containing the culture product, flows; a heating part (6) which is disposed in contact with or close to one surface of the channel (5) and which heats the liquid culture medium; and a ultraviolet irradiation part (8) which is disposed at a position facing the heating part (6) in contact with or close to the other surface of the channel (5) and which irradiates ultraviolet rays to the liquid culture medium.