Abstract: It is intended to provide a process for producing a plant germ extract wherein the step of breaking a plant germ into fine pieces is carried out by impacting or cutting and/or in the presence of an extraction solvent, and a germ extract obtained by this process which is contaminated with little impurities unnecessary or exerting undesirable effects in cell-free protein synthesis. Thus, cell-free protein synthesis can be performed at a high stability and a high efficiency.