To provide a multiple phase triangle wave oscillation circuit which can oscillate and output multiple phase triangle waves in relation of waveforms, wave peak values, and phases as specified, and stably and surely oscillates and outputs the expected multiple phase triangle waves even if there is a variation in the property of a circuit element.

The multiple phase triangle wave oscillation circuit is provided with two triangle wave oscillation circuits 10A, 10B for generating 2 phase triangle waves A, B which are mutually inverse phases, a neutral point potential fixing part 20 which always fixes neutral point potentials of output voltages A, B of both the triangle wave oscillation circuits 10A, 10B, and a mode switch 30 which instantly switches output voltage oscillation modes (up slope wave form mode/down slope wave form mode) of the both triangle wave oscillation circuits 10A, 10B in a standard wave peak value level established beforehand.