A material which is a uni-directional tape comprising continuous reinforcing fibers that are juxtaposed unidirectionally, and having a polyamide resin impregnated therein, wherein the continuous reinforcing fiber gives a non-circular cross sectional shape, when viewed perpendicularly to the longitudinal direction thereof, with a flatness ratio, given by long diameter (D2)/short diameter (D1), of 1.5 or larger, and in at least one cross section of the material taken perpendicularly to the direction of the continuous reinforcing fibers being juxtaposed, the percentage of area occupied by the continuous reinforcing fibers, whose long diameter (D2) lying at an angle of less than 20 degrees away from the direction of the continuous reinforcing fibers being juxtaposed, is 30 to 90% by area of the continuous reinforcing fibers, wherein the percentage of area occupied by the continuous reinforcing fibers is determined by the following method: the uni-directional tape is cut perpendicularly to the longitudinal direction of the continuous reinforcing fiber, the cross sectional surface thereof is polished, and the cross sectional surface is then photographed under a ultra-deep color 3D shape analyzing microscope, followed by freely selecting five points in 250 μm×250 μm region on the thus obtained cross sectional image, and angle α which is the smaller one of the angles between the direction perpendicular to the direction the continuous reinforcing fibers are juxtaposed, and the long diameter of the continuous reinforcing fiber are measured for all continuous reinforcing fibers in each region, wherein subsequently the percentage of the continuous reinforcing fibers with an angle α of smaller than 20 degrees, or exceeding 70 degrees is determined by (Area of continuous reinforcing fibers with angle α of smaller than 20 degrees, or exceeding 70 degrees)/(Area or all continuous reinforcing fibers) in the freely selected regions; and the longest part of the cross section is defined as the long diameter (D2), and the section that lies in the direction perpendicular to the long diameter is defined as the short diameter (D1). the uni-directional tape is cut perpendicularly to the longitudinal direction of the continuous reinforcing fiber, the cross sectional surface thereof is polished, and the cross sectional surface is then photographed under a ultra-deep color 3D shape analyzing microscope, followed by freely selecting five points in 250 μm×250 μm region on the thus obtained cross sectional image, and angle α which is the smaller one of the angles between the direction perpendicular to the direction the continuous reinforcing fibers are juxtaposed, and the long diameter of the continuous reinforcing fiber are measured for all continuous reinforcing fibers in each region, wherein subsequently the percentage of the continuous reinforcing fibers with an angle α of smaller than 20 degrees, or exceeding 70 degrees is determined by (Area of continuous reinforcing fibers with angle α of smaller than 20 degrees, or exceeding 70 degrees)/(Area or all continuous reinforcing fibers) in the freely selected regions; and the longest part of the cross section is defined as the long diameter (D2), and the section that lies in the direction perpendicular to the long diameter is defined as the short diameter (D1). <EOS>