Understanding　the　three-dimensional　(3D)　effect　on　the　notch　tip　field　is　important　for　the　fracture　mechanics　analysis　of　engineering　materials　and　structures.　This　paper　presents　an　asymptotic　solution　for　3D　sharp　V-notched　structures　subjected　to　mode　I　creep　loading　condition.　The　asymptotic　solution,　including　the　singularities　and　stress　field　distribution　functions,　is　obtained　by　introducing　the　out-of-plane　constraint　factor.　It　is　found　that　the　singular　behavior　is　related　to　the　notch　angle,　material　creeping　exponents,　and　the　out-of-plane　constraint　factor.　Specifically,　singularity　changes　sharply　near　the　free　surface.　K-N　(t)　-T-z　solution　is　presented　to　describe　the　mode　I　stress　field　around　the　tip　of　3D　V-notch　under　creep　condition.　Its　accuracy　and　advantages　compared　with　plane　strain　or　plane　stress　solutions　are　validated　by　finite　element　analysis.　The　difference　between　effective　ranges　of　K-N　(t)　-T-z　solution　and　that　of　plane　strain　solution　is　clarified.　Moreover,　the　effect　of　the　creep　time　on　the　stress　field　is　also　shown.　The　solutions　given　in　this　paper　could　be　beneficial　for　understanding　the　3D　effect　on　notch　considering　creep　loading　conditions.