PURPOSE: To improve a grinding efficiency in a wire saw used for a large stone cutting, etc., by making a lot of abrasive grain layer tips fitted to a flexible base body freely rotatable and also forming a spiral groove inclined at a constant angle on the outer peripheral face thereof.

CONSTITUTION: This wire saw is what is endlessly connected with a lot of segments 1 equipped with abrasive grain layer tips 3. These segments 1 are composed of a segment main body 4 fixed with a cylindrical abrasive grain layer tip 3 on the outer periphery of a connection cylinder 2, a male member 5 fixed to the end of this segment main body 4 and a female member 6. A connection cylinder 2 is formed with the metal of an SK steel, etc., and a female thread 7 is formed respectively at both ends of the inner face thereof. On the other hand, a spiral groove 8 inclined at a constant angle to the axial line is formed on the outer peripheral face of each abrasive grain layer tips 3. Each segment 1 are then connected rotatably at a desired angle, when an open part is calked by inserting the spherical part 11 of the male member 5 into the spherical hole 14 of the female member 6.