A device configured to promote the production of a neurotrophic factor or neurotrophic factor-like substance, via application of magnetic stimulation to cells, the device comprising: a high frequency electromagnetic wave generating means generating a high frequency electromagnetic wave of a predetermined high frequency for promotion of production, in order to apply a high frequency alternating magnetic field of the high frequency for the promotion of production to the cells at a magnetic flux density of no more than 0.01 Tesla, and comprising a high frequency coil (30, 30A, 30B) that generates the high frequency electromagnetic wave; and a frequency controlling means controlling the high frequency for promotion of production of the high frequency electromagnetic wave generated by the high frequency electromagnetic wave generating means in the range of 20 MHz to 180 MHz, 280 MHz to 600 MHz, or 700 MHz to 1000 MHz, so that the magnetic stimulation by the high frequency alternating magnetic field of the high frequency for the promotion of production allows the concentration of calcium ions within the cells to be increased so that exocytosis of the neurotrophic factor or the neurotrophic factor-like substance is induced, and the magnetic stimulation allows messenger ribonucleic acid (mRNA) of the neurotrophic factor or the neurotrophic factor-like substance to be increased in the cells so that the synthesis and extracellular release of the neurotrophic factor or the neurotrophic factor-like substance are promoted; and the device further comprising: a low frequency electromagnetic wave generating means generating a low frequency electromagnetic wave in the kHz frequency band and comprising a low frequency coil (40, 40A, 40B) that generates the low frequency electromagnetic wave, and wherein the low frequency coil (40, 40A, 40B) is different from the high frequency coil (30, 30A, 30B); and wherein the frequency controlling means is adapted to generate the high frequency electromagnetic wave intermittently and such that the timing of the high frequency electromagnetic wave is synchronized with the timing of the low frequency electromagnetic wave. a high frequency electromagnetic wave generating means generating a high frequency electromagnetic wave of a predetermined high frequency for promotion of production, in order to apply a high frequency alternating magnetic field of the high frequency for the promotion of production to the cells at a magnetic flux density of no more than 0.01 Tesla, and comprising a high frequency coil (30, 30A, 30B) that generates the high frequency electromagnetic wave; and a frequency controlling means controlling the high frequency for promotion of production of the high frequency electromagnetic wave generated by the high frequency electromagnetic wave generating means in the range of 20 MHz to 180 MHz, 280 MHz to 600 MHz, or 700 MHz to 1000 MHz, so that the magnetic stimulation by the high frequency alternating magnetic field of the high frequency for the promotion of production allows the concentration of calcium ions within the cells to be increased so that exocytosis of the neurotrophic factor or the neurotrophic factor-like substance is induced, and the magnetic stimulation allows messenger ribonucleic acid (mRNA) of the neurotrophic factor or the neurotrophic factor-like substance to be increased in the cells so that the synthesis and extracellular release of the neurotrophic factor or the neurotrophic factor-like substance are promoted; and the device further comprising: a low frequency electromagnetic wave generating means generating a low frequency electromagnetic wave in the kHz frequency band and comprising a low frequency coil (40, 40A, 40B) that generates the low frequency electromagnetic wave, and wherein the low frequency coil (40, 40A, 40B) is different from the high frequency coil (30, 30A, 30B); and wherein the frequency controlling means is adapted to generate the high frequency electromagnetic wave intermittently and such that the timing of the high frequency electromagnetic wave is synchronized with the timing of the low frequency electromagnetic wave.