A wire saw which has excellent cutting ability and which is not easily clogged by chips formed by cutting is provided.It has a body 6 having a first metal wire 1 which is made of a cobalt-based alloy, two second metal wires 2a and 2b which are made of a cobalt-based alloy, and three third metal wires 3a-3c which are made of a cobalt-based alloy and are wound on the first metal wire 1. The second metal wires 2a and 2b are helically wound on each of the third metal wires 3a-3c in opposite directions so as to cross each other. Cutting teeth are constituted by projections 8 which are formed by the crossing points of the two second metal wires 2a and 2b.