A method of preparing adipose tissue for transplantation, from lobular fat extracted, for instance, by liposuction, said fat consisting of a fluid component comprising an oily component, a blood component and/or sterile solutions and of a solid component comprising cell fragments, cells and one or more cell macroagglomerates of heterogeneous size, characterized in that it includes at least one step of forming an emulsion of the fluid component in the sterile washing solution by means of active and/or passive stirring means and discharging the emulsion from the outlet through a density gradient.
