To improve the cleanability/maintainability of a bread baking chamber in an automatic bread baking machine for a general household use.

For this automatic bread baking machine, by turning the baking chamber into the bisected constitution of a side wall 36 and a bottom part 37, making it freely attachable and detachable and also making a heater 39 freely attachable and detachable, when the baking chamber gets dirty or bread waste is accumulated, the baking chamber side wall and the baking chamber bottom part are easily detached and the effect of improving the cleanability/ maintainability is obtained.