To provide a fixed amount shake-out device capable of adequately shaking out a powder or granular material of the fixed amount without tilting a vessel to an inverted attitude.

In the fixed amount shake-out device, a space S comprising a bottom wall 20, a top wall 40, and a cylindrical wall 30 connecting outer circumferences thereof is formed on an upper part of the vessel, a tapered cylinder 21 which is protruded in an upwardly contracting manner with a tip thereof opened in the space S is formed on the bottom wall 20, a skirt wall 41 suspended from the top wall 40 so as to surround the tapered cylinder 21 is formed, and a shake-out opening 50 is formed outside a skirt wall forming part in the top wall 40 or the cylindrical wall 30. The shake-out opening 50 is formed in one part in the circumferential direction in the top wall 40 or the cylindrical wall 30, and the height of the skirt wall 41 from the top wall 40 is generally set so that the shake-out opening side 41a is higher than the tapered cylinder 21, and the shake-out opening 50 and the facing side 41b are lower than the tapered cylinder 21.