To provide a cutter for a coaxial cable having no possibility of generating cut powder and cut burrs when cutting the coaxial cable and of causing collapses on an outer conductor at a cut section.

This cutter comprises a cable support section 5 equal or similar in shape to the coaxial cable 17 to be cut, a cutter blade 11 arranged to face the cable support section 5 and biting into the coaxial cable 17 fitted to the cable support section 5, a spring body 13 applying the pressing force to the cutter blade 11 to let the cutter blade 11 bite into the coaxial cable 17, and a frame body 1 arranged with the cable support section 5, the cutter blade 11, and the spring body 13 at prescribed positions respectively and rotated around the coaxial cable 17.