Provided are a single-layer or multi-layer polyester long fiber nonwoven fabric excellent in transparency, dimensional stability, powder leakage, and component extractability, and a food filter using the same. The single-layer or multi-layer polyester long-fiber nonwoven fabric according to the present invention has an inorganic particle content of 0 to 100 ppm, a 10% point pore diameter of less than 1000 μm, and a difference between a 10% point pore diameter and a 2.3% point pore diameter. 500 or less and the basis weight is 10 to 30 g / m2.透明性、寸法安定性、粉漏れ性、及び成分抽出性に優れた単層又は複層ポリエステル長繊維不織布、及びそれを用いた食品用フィルターの提供。本発明に係る単層又は複層ポリエステル長繊維不織布は、無機系粒子の含有量が0～100ppmであり、10%点孔径が1000μm未満であり、10%点孔径と2.3%点孔径の差が500以下であり、かつ、目付が10～30g/m2である。
