PURPOSE: To realize a small-sized switch system with high reliability by interlocking a waveguide switch and a coaxial switch with a magnetic force.

CONSTITUTION: A high power passes through a waveguide switch section W. A signal amplifying a received signal passes through a coaxial switch section C. A shaft 32 of a drive section D turns by 90°. Then, a roll 55 moves along a parallel groove 18, a disc 17 is turned, and a rotor 12 having a through-hole 13 is turned, allowing to change over the waveguide switch. A disc 20 having a magnet 21 is turned attended with the turning of the rotor 12. An armature 88 is attracted by a magnetic force of the magnet 21 and a seesaw 81 of the coaxial switch is moved for attaining the changeover. Both switches are operated surely at the same time. This system is suitable for the changeover of an existing set and a spare set.