Abstract: The purpose of the present invention is to provide: a cosmetic base material which is capable of stably retaining lecithin in the form of a liposome; and a cosmetic preparation which contains this base material and has excellent usability (such as soft texture when applied to the skin and quick adhesion to the skin) and excellent stability. The present invention relates to: a cosmetic base material which is characterized by containing (a) a liposome that contains (a-1) lecithin and (a-2) an oryzanol, and (b) an aqueous medium that contains (b-1) water and (b-2) a polyhydric alcohol, and which is also characterized in that the ratio of the blending amount of the liposome (a) to the blending amount of the aqueous medium (b), namely (a):(b) is within the range of from 1:99 to 1:32; and a cosmetic preparation which contains a microemulsion part and a liposome part that is composed of this base material.