[Problem to be Solved] An object of the present invention is to provide an aqueous writing tool for a food product packaging material, which can provide written products having high color developability and fixing properties upon writing on food product packaging materials.[Solution] An aqueous writing tool for a food product packaging material comprising an ink comprising two or more pigments and one or more dispersants, wherein at least one of the pigments being a white pigment, the total content of the pigments being 10 to 25% by mass based on the total amount of the ink, and the total content of the dispersants being 1 to 5% by mass based on the total amount of the ink.