PURPOSE: To arrange a device in a reduced space, to facilitate handleability, maintenance and installation and to reduce the number of parts, etc.

CONSTITUTION: A dryer part of a paper machine is equipped with a microwave generator 2, a high-voltage electric source device 1, a waveguide 4, a circulator 5, a matching device 6, a control panel 3 and a dry hood 7, and microwave 9 is uniformly emitted to paper 9 passing through the dry hood 7 so that heat is generated by molecular movement of water itself in the interior of the paper 9 and the surface and the interior of the paper are simultaneously and uniformly heated in proportion to applied energy to dry the paper 9.