The　effect　of　tunnel　slope　on　the　fire　induced　hot　gas　temperature　profile　beneath　the　ceiling　has　not　been　clarified　nor　included　in　existing　models.　Thus,　in　this　paper　experiments　are　carried　out　in　a　reduced　scale　model　tunnel　with　dimensions　of　6　m　(length)　x　1.3　m　(width)　x　0.8　m　(height),　which　is　positioned　within　a　72　m　long　wind　tunnel.　The　slopes　of　the　model　tunnel　are　varied　at　three　typical　different　degrees,　0%,　3%　and　5%.　A　LPG　porous　gas　burner　is　used　as　fire　source.　Both　the　maximum　gas　temperature　and　the　temperature　distribution　along　the　tunnel　ceiling　are　measured　and　compared　with　previous　models.　Results　show　that　those　models　overestimates　the　maximum　temperature　beneath　the　ceiling　of　a　slopping　tunnel　fire.　The　gas　temperature　decays　faster　along　the　ceiling　for　tunnels　with　higher　slope.　Empirical　correlations　are　then　proposed　to　modify　the　current　models　to　include　the　tunnel　slope　factor.　The　predictions　by　the　modified　equations　of　this　work　agree　well　with　the　measured　data　in　both　the　maximum　temperature　and　temperature　decay　beneath　the　ceiling　of　the　tunnel　with　different　slopes.　(c)　2012　Elsevier　Ltd.　All　rights　reserved.