A magnetic field generating-apparatus (1, 1A) for biostimulation including: a core (2, 22) formed by magnetic material； and coils (3, 23) wound around portions of the cores (2, 22), wherein the core includes at least two pairs of leg portions (20b, 21b, 22b)which are juxtaposed each other, in which for the respective two pairs of leg portions (20b, 21b, 22b), there are provided gap-portions (20c, 21c) which mutually cross each other, the coils (3, 23) include first coil portions (3a) and second coil portions (3b) forming a first magnetic-path and a second magnetic-path between the two pairs of leg portions (20b, 21b, 22b) and the gap-portions (20c, 21c) respectively； and wherein there is generated a magnetic field of first direction which lies on the first magnetic-path, there is generated a magnetic field of second direction which lies on the second magnetic-path, and depending on a magnetic field formed by synthesizing the magnetic field of first direction and the magnetic field of second direction, a living body is stimulated.
