To provide a method for separating and purifying
extracellular vesicles.SOLUTION: Wherein the
hollow fiber membrane has an inner
diameter of 0.2 mm to 1.4 mm and a molecular weight
cut-off of 100,000 to 1,000,000, and the
filtration method comprises a first
filtration step of pressurizing and filtering a culture supernatant of mesenchymal stem cells through a first opening on one end side of the
hollow fiber membrane to separate the culture supernatant into a permeated liquid and a first concentrated liquid, and a second
filtration step of pressurizing and filtering the first concentrated liquid through a second opening on the other end side of the
hollow fiber membrane; A method for separating and purifying
extracellular vesicles, the method comprising a second filtration step of separating the
extracellular vesicles into a permeate and a second concentrate, wherein a concentrate having an increased concentration of the
extracellular vesicles is obtained by alternate tangential flow filtration in which the first filtration step and the second filtration step are alternately performed a plurality of times, and a
membrane surface speed in the first filtration step and the second filtration step is 0.3 to 2m / sec.SELECTED DRAWING: None