The paper summarizes data on germanium and gallium concentrations in natural magmatic melts as follows from analyses of mineral-hosted inclusions and quench glasses in volcanic rocks. Germanium concentrations in melts vary from 0.96 to 17.6 ppm (1472 determinations). The geometric mean germanium concentration in silicate melts is 1.56 ppm, which is quite close to the clarke value. Concentrations of gallium in magmatic melts vary from 0.47 to 495 ppm (8755 determinations). The geometric mean of gallium concentration in silicate melts is 19.0 ppm, which is also close to the clarke value. Germanium concentration in hydrothermal fluids ranges from 0.01 to 930 ppm (405 determinations), and the geometric mean value is 17.0 ppm. Concentrations of gallium in fluids vary from 0.02 to 320 ppm (441 determinations), with a geometric mean of 2.0 ppm. The possible reasons for the differences in germanium and gallium concentrations in natural melts and fluids are discussed.