The purpose of the present invention is to provide: an adhesion improver which contains an edible plant-derived component and is used in an edible base material for culturing cells; a cell culturing scaffolding material containing said adhesion improver; and a tissue body containing said cell culturing scaffolding material. A cell culturing scaffolding material suitable for producing cultured meat can be produced by applying an adhesion improver containing an edible plant-derived component to an edible base material for culturing cells.