The invention discloses an optical device for virtual reality, which comprises a glass shell, a support plate, a face support frame and a head hoop, wherein the shell is provided with a lifting forcesupply device. Thus, the pressure on the head of a user by the weight of the device can be greatly reduced, possible damages to body parts such as the head and the neck after long time wearing can beavoided, and the comfort of the device wearing by the user is improved. Besides, as a head band is fixedly connected between the glass shell and the head hoop, the face pressure of the user can be shouldered in the case of use, and in match with a flexible foam pad arranged at the edge of the inner side of the face support frame and a buffer pad arranged at the inner side of the head hoop, the usecomfort is effectively enhanced.