The invention discloses a mushroom illumination device, which comprises a conveyor belt mechanism and a light source mechanism. The belt mechanism provides a stable moving belt plane. And the light source mechanism is arranged across the upper part of the wheel belt conveying mechanism, and has a luminescent body providing a specific wavelength of ultraviolet light. By the composition of the above-mentioned institutions, the finished mushroom products are irradiated by ultraviolet light, so as to improve the content of vitamin D in the finished mushroom products, and the finished mushroom products are sterilized to provide the nutrition, safety and health of the finished mushroom products.本創作係揭露一種菇菌光照裝置,包括一輸送帶機構及一光源機構。該輸送帶機構係提供一穩定移動之帶狀平面。而該光源機構係橫跨於輪送帶機構上方,具有一提供特定波長紫外線光之發光體。藉由上述機構之組成,透過紫外線光對菇菌成品進行照射,俾以提升菇菌成品中維生素D之含量,且一併對菇菌成品進行殺菌,提供菇菌成品食用之營養及安全衛生。