The present invention provides a highly flexible spunbonded nonwoven fabric that has a uniform texture, a smooth surface, and excellent feeing and tactile property, and that comprises highly productive polyolefin fibers having preferable spinnability while having a small average single fiber diameter. The present invention pertains to a spunbonded nonwoven fabric made of fibers comprising a polyolefin resin, wherein the average single fiber diameter of the fibers is 6.5-11.9 [mu]m, the fiber dispersity obtained by using reflected light brightness is 10 or lower, and the surface roughness SMD of at least one surface of the fabric as measured by a KES method is 1.0-2.6 [mu]m.本發明提供一種紡黏不織布，其包含雖然平均單纖維直徑為細徑但是紡絲性良好且生產性高的聚烯烴系纖維，質地均勻，表面光滑且手感、肌膚觸感優異，更具有高柔軟性。本發明係關於一種紡黏不織布，其係由包含聚烯烴系樹脂的纖維所構成之紡黏不織布，其中前述纖維之平均單纖維直徑為6.5~11.9μm，根據反射光亮度之纖維分散度為10以下，且至少單面之根據KES法之表面粗糙度SMD為1.0~2.6μm。
