A highly improved unit operating on diesel oil or gas and designed to supply a rationally and properly distributed heat for the production of an excellent quality pita bread. Equipped with a feeding unit conveying automatically the leavened dough sheets from the final proofer into the baking chamber of the oven, built with high temperature resistant refactory isolation material. This perfect thermal insulation of the body prevents any heat loss, resulting into a remarkable saving of fuel. The outer body is also entirely covered with stainless steel plates, giving the unit and distinguished appearance. The unit is equipped with a central switch board with all electric control knobs and safety elements on the burner unit. The machine is mechanically simplified, permitting easy operation by untrained labor and minimizing the need of maintenance.