To provide a milling device most suitable for buckwheat flour or the like, which performs cutting type milling in a gap between a lower mortar and an upper mortar, and is small, lightweight, and easy in handling.

A lower mortar setting file 4 and an upper mortar setting file 3 are fixed on a lower mortar 1 and an upper mortar 2, respectively, and either of the mortars is rotationally driven while keeping a gap between them so as to be constant according to the size of grain to be milled. A pressurizing spring 6 can adjust a pressing force for milling, and at least one blade 12 is disposed to accelerate the supply and discharge of raw grains.