Abstract: Disclosed is a heat sensitive sheet which can develop a black image having excellent oil and light resistance, comprising a combination of a record sheet to be printed and a transfer sheet for forming an image on said record sheet, wherein said record sheet is coated with a solution comprising an organic or inorganic nickel compound an an organic and inorganic copper compound and said transfer sheet is coated with dithiooxamide. The present invention also provides a transfer sheet which can form a printed black image having excellent oil and light resistance on any type of record sheets. The transfer sheet is coated with an organic compound having a phenolic hydroxyl group or an amino group directly bonded to aromatic ring and quinone or a quinone derivative substituted by an electron attractive group in such a condition that the organic compound is not reacted with quinone or the quinone derivative.