PURPOSE: To improve the working efficiency and to prevent the contamination and the breakage of a sample by using a handle.

CONSTITUTION: This mesh is composed of a round sample holder 4 having a single hole of opening hole 1, and a handle 2, and a sample is held by sticking or the like at the part of the opening hole 1 provided at the center of the holder 4. The holder 4 having the opening hole 1, and the handle 2 are formed to be on the same plane integrally. The form of the opening hole 1 has no limitation as far as it is suitable to hold the sample. The form of the handle 2 may be triangular, quadrilateral, or semicircular, and has no specific limitation as far as it can be used as a handle when the mesh is carried and installed. By such a way, the working efficiency is improved, and the contamination and the breakage of the sample can be prevented.