The German Torpedo Minen (TM) mine series consisted of four types of influence mines, all of which could be laid from the torpedo tubes of submarines. These four types were designated TMA, TMB, TMC, and MTA. Each type was operationally during World War II.

The Germans commenced the development of the TM mine series in about 1928, when the design of the TMA was begun. While the TMA was development, the TMB I, TMB II, and TMC I were also under development. As a result of this early start, the TMB and TMC cases, using the M 1 unit, were ready for operational use at the outbreak of the war. The TMA case was ready at the same time, but its magnetic unit, the M 2, was not ready until 1940. The other mines of this series, which were all late developments, were the TMB III, TMB (S), TMB (mit Auftriebskörper), "with floation chambers", TMC II and MTA. All of these mines were used operationally during the war.