PROBLEM TO BE SOLVED: To improve the digestion and the absorption efficiency of egg shell membrane components more than the conventional case.SOLUTION: Egg shell membrane-including fine powder is characterized in that the volume-average particle size is ≤6 μm and/or the volume maximum particle size is ≤20 μm. A tablet uses the same. Further, a method for producing egg shell membrane-including fine powder and a method for producing a tablet using the same are provided.