To provide an apparatus for extending a bread dough, etc., continuously spreading a dough having even a high viscoelasticity into a thin sheetlike state, having excellent extension efficiency of dough, capable of readily forming a high-quality dough having uniform thickness and a uniform inner layer.

This apparatus for extending bread dough or the like is equipped with a transporting device 7 comprising a rotator having plural arranged planet rollers revolving on a circumferential locus, plural rollers 3, 4 and 5 having a peripheral speed successively increasing from the inlet to the outlet of dough below the rotator and a circular arc-shaped plate 6. A curved gap formed between the transporting device 7 and the upper planet rollers facing the device is made in such a way that a gap between the plural rollers 3, 4 and 5 of the transporting device 7 and the upper planet rollers 11 is gradually decreased from the inlet to the outlet of a dough.