This study was experimented by reviewing the possibility of applying non-sintered loess as a building material. Andthis study was to evaluate and compare flexural and compressive strengths characteristics of cementless mortar with non-sintered loess according to percentage of non-sintered loess and the type of curing without adding any cement. SEM,chloride ion penetration resistance and chemical resistance were also evaluated and compared to study characteristics ofcementless mortar with non-sintered loess. In order to evaluate the characteristics of cementless mortar with non-sinteredLoess. Test pieces were fabricated at 3, 7 and 28 days depending on the percentage of non-sintered loess and the typeof curing. And also normal portland cement mortar were fabricated to compare with cementless mortar with non-sinteredloess. The result of this study, Properties of cementless mortar with non-sintered loess strength are generally lower thannormal portland cement mortar. However cementless mortar with non-sintered loess which is mixed 20% show equallyas normal portland cement mortar. Also, cementless mortar with non-sintered loess show excellent results than normalportland cement mortar in the durability characteristics. The purpose of this study was to expand the utilizable scope ofnon-sintered loess and to use the basic data as a applying building material in the future.