An automatic bread maker includes a housing; a baking pan disposed inside the housing to mix or heat bread ingredients and disposed with an upwardly facing entrance; and a hanging rack disposed inside the housing that accommodates a bread ingredient box and a stock bin disposed below the hanging rack and above the upwardly facing entrance. The hanging rack is disposed with a sawtooth blade that faces upwardly to pierce the bread ingredient box and the stock bin is disposed with a drop opening that faces the upwardly facing entrance and that has a size that is smaller than that of the entrance so that, when the bread ingredient box is pierced, the bread ingredients drop down into the stock bin, and wherein a driver is further disposed to control opening and closing of a cover of the stock bin to discharge at least a portion of the bread ingredients.