FOOD PROCESSING DEVICE

A food processing apparatus (100) includes a reaction tank (1) having an internal space (S 1) for storing a reactant that is in a liquid state and that is used for food, a cooler (10) that cools a reactant stored in the reaction tank (1), and a catalytic reactor (6) disposed in the internal space (S 1). The catalytic reactor (6) includes a reaction tube (7), a light source (8) disposed in the interior of the reaction tube (7), and a heat insulator (14) disposed between the reaction tube (7) and the light source (8). The outer surface of the reaction tube (7) is provided with a photocatalyst. The reaction tube (7) allows light radiated from the light source (8) to pass therethrough. The reaction tube (7) has a first end, and the first end is closed so as to serve as a bottom surface (7c) of the reaction tube (7). The thermal conductivity of the heat insulator (14) is lower than the thermal conductivity of the reaction tube (7).