<p>An oriented polyester film has at least one surface roughened by containing inactive particles and three-dimensional surface roughness exponents of the said roughened surface are within ranges simultaneously satisfying the following relationships (I) to (III), while the number of coarse projections is in excess of the fourth grade:where SAa represents three-dimensional average gradient, Sλa represents the spatial average wavelength (µm) of three-dimensional surface roughness and SRa represents three-dimensional central plane average roughness (µm).</p>
