To provide a reusable paper screen corner protector for surely protecting a sash paper screen corner as easy and effectively as possible.

In forming a corner protector A, a corner fitting member 1 with a recess 2 for fitting the corner of a paper screen B is formed using a synthetic resin foamed cushioning material, a pair of members 1 are joined by a loop-form connection rope 3 such as a rubber rope and a rope stopper 4 is positioned in the middle of the connection rope 3 for adjusting the length of the rope 3. The two top corners and the bottom two corners of the screen B, each forming a pair, are protected by each protector A. The members 1 do not fall because they are connected by the rope 3 and the corners are surely and easily protected. It is easy to remove the members 1.