To provide a wet paper drying apparatus that can be downsized and prevent abnormal sound and abrasion.

There is provided a wet paper drying apparatus 6 that dries wet paper 39 while the wet paper 39 is conveyed by a conveyance belt 44. The conveyance belt 44 is freely rotatable along an endless track with being wound around an outer peripheral surface of a drying drum 46 that has a cylindrical shape and is freely rotatable and a freely rotatable roller. The drying drum 46 includes a flexible sheet-like heating device 71 for heating the drying drum 46 and energization means 72 for pressing the heating device 71 against the inner peripheral surface of the drying drum 46.