Abstract: The present invention provides a sauna room which allows to bathe at a low temperature by utilizing the far-infrared ray effect of a radiator and is superior in hygiene, in safety by avoiding the possibility of falling over and burning, in energy savings without losing the far-infrared ray effect and in workability for construction and cleaning. The sauna room comprising a heat source having at least one selected from a group of a heating conduit, heating pipe and electric heating sheet which supply heat to a floor part, a mortar layer for bathers formed on the floor part with a predetermined height and width, a slab rock radiator radiating electromagnetic waves such as far-infrared rays which is embedded on the mortar layer for bathers exposing the surfaces thereof and a wastewater catchment part formed at least at one side of the mortar layer for bathers.