NOVELTY - A manufacturing system of biodiesel fuel consists of an ester reactor (100) which produces primary biodiesel fuel having fatty-acid methyl ester with glycerol, a methanol recovery apparatus (200) for recovering methanol liquid by condensing methanol vaporized in a vaporization treatment tower (T1), a filter apparatus (300) in which methanol-removed biodiesel fuel remained in the vaporization treatment tower (T1) is filtered, and a distillation purification apparatus (400) for generating final biodiesel fuel.    USE - System is used for manufacturing biodiesel fuel used as fuel for vehicle.    ADVANTAGE - The system provides biodiesel fuel with high purity, with small-scale equipment.    DETAILED DESCRIPTION - A manufacturing system of biodiesel fuel consists of an ester reactor which produces primary biodiesel fuel having fatty-acid methyl ester as a main component with glycerol by transesterification in the reactor in which reaction liquid containing raw material oil and methanol is introduced while heating, a methanol recovery apparatus for recovering methanol liquid by introducing methanol vaporized in a vaporization treatment tower (T1) to a cooler and condensing, while heating the primary biodiesel fuel separated from glycerol, a filter apparatus in which methanol-removed biodiesel fuel remained in the vaporization treatment tower (T1) is introduced, and filtered through a filter provided with a filter medium, and a distillation purification apparatus in which filtered biodiesel fuel vaporized within a vaporization treatment tower (T2) is introduced into a cooler under reduce pressure, condensed and biodiesel fuel is generated.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of block diagram of fundamental structure of the manufacturing system of biodiesel fuel. (Drawing includes non-English language text)    Raw material tank (10)    Ester reactor (100)    Methanol recovery apparatus (200)    Filter apparatus (300)    Distillation purification apparatus (400)