A digital/analog converting circuit wherein, on the digital signal input side of each of resistances D.sub.1, D.sub.2 . . . D.sub.n whose one end being connected to a digital signal input and the other end to an analog signal output, each of the three-state non-inverting buffers B.sub.1, B.sub.2 . . . B.sub.n is provided, and between the analog signal output side of the resistance D.sub.n and the ground potential portion, a MOS transistor 20 is provided. It enables to switch the output/non-output or an analog signal obtained by converting a digital signal, and as a result, a digital/analog converting circuit not generating non-linear region in the digital/analog conversion characteristic can be obtained.