The Munich MP tandem accelerator is in operation since 1970. Now it is equipped with a NEC Pelletron charging system and HVEC stainless steel tubes. The negative ion injector and the high energy extension with the analyzing system were completely reconstructed. Also the instrumentation was improved continuously. The tandem is used in an increasing degree not only for nuclear and atomic physics, but also for biological and material science work. ©1999 American Institute of Physics.