The utility model discloses a bulb structure of a high luminous efficiency electrodeless lamp. The bulb structure includes a glass bulb housing of the electrodeless lamp, a metal shielding net, a coupler, a built-in reflector and a sealing member. The whole electrodeless lamp is designed in integration, the metal shielding net clings to the outer wall of the glass bulb housing, and the built-in reflector and the coupler are sealed in the bulb housing through the sealing member. According to the bulb structure, disordered diffusion lights, in the bulb, of the lights produced by the bulb housing are blocked and reflected by the built-in reflector, a conventional build-in concave tube in the bulb of the electrodeless lamp is canceled, needless energy waste is reduced, and the metal shielding net can shield electromagnetism and raise the transmittance of the bulb. The ambient temperature of the coupler can be reduced, the utilization rate of electromagnetic energy is raised, and the luminous efficiency is high, the light decay is low, and a high power and high frequency electrodeless lamp can be produced by adopting the bulb structure of the high luminous efficiency electrodeless lamp.