An electrodeless discharge lamp has a magnetic core 3, an induction coil 5, and a fixation member 7. The fixation member 7 has an elongation portion 7b extending in a direction along an axial line of the magnetic core 3, a holding portion 7c for holding the magnetic core 3 positioned closer to the magnetic core 3 than the elongation portion 7b, and hook portions 7d and 7e to which a winding wire 7 is hooked so as to be inflected. The hook portions 7d and 7e positioned away from a boundary between the holding portion 7c and magnetic core 3 toward the elongation portion 7b by a distance between once and twice of a diameter of the winding wire.