Abstract: A sitting type water closet including a toilet bowl having an inner side and an outer side; a warm air duct for conveying warm air, formed on a first lower portion of the outer side of the toilet bowl as one piece therewith; a warm air outlet, disposed at an end of the warm air duct, for releasing warm air conveyed by the duct, the warm air outlet being at a mid position in the fore and aft direction of the toilet bowl and formed as one piece therewith; and a warm air guiding groove extending from the warm air outlet to the front of the toilet bowl, the warm air guiding groove being formed on a second lower portion of the outer side of the toilet bowl as one piece therewith.