A hot plate comprises a rectangular lower section having a heating chamber formed therein, and an upper section elected upward at the back end of the lower section and having a gas chamber formed therein. The gas chamber has a gas staying space located above the heating chamber. A liquid contained in the heating chamber is heated by a gas burner so that it is gasified into heated gas to heat a heating surface of the lower section. Non-condensed gas created from the heated liquid is gathered in the gas staying space.
