A bread baking apparatus makes dough by kneading raw ingredients tossed into a bread baking case installed in an oven, and baking after fermentation. The object of this invention is to conveniently provide attractive-appearing bread having a specified expanded volume and a prespecified color when baked. Namely, in order to prevent undesirable results, such as expanding more or less than specified in the fermenting process, or being affected by external room temperature and humidity which has penetrated the oven through a glass lid installed on the baking oven, this apparatus is provided with means for detecting fermenting conditions while fermenting, and means for extending the fermenting process time. This apparatus is further provided with baking timer means for defining the color of the final baked product by applying temperature measuring means. Furthermore, air ventilating and heating means, especially uniform heating means during baking are provided in this apparatus to prevent unwanted changes in the baking bread.