A method for preparing a leukocyte preparation from a leukocyte fraction and a correspondingly prepared or obtainable leukocyte preparation and its use. The methods include: a) sedimenting the leukocyte fraction removing leukocyte supernatant from the sediment, wherein the leukocyte supernatant is collected or remains in a leukocyte container, b) sedimenting the leukocytes in the leukocyte container, c) washing the sediment in the leukocyte container with a saline solution, and d) resuspending the sediment in the leukocyte container in a storage solution.
