To stably bring a U-shaped lens mounting frame consisting of an elastic member up and down by bending both ends of this lens mounting frame parallel with each other toward the outer side and mounting a member to be inserted with such both ends to a spectacle frame and providing the opposite cut ends of this member with notches.

Hinges are used for the frame of the conventional spring up type spectacles and, therefore, the flapping of the frame is caused by loose screws and the frame is unstable even if the frame is sprung upward. Both ends of the U-shaped lens mounting frame are, thereupon, bent parallel toward the outer side and the member to be inserted with such both ends is mounted at the spectacle mounting frame. The opposite cut ends of the member are provided with the notches. As a result, the lens mounting frame does no longer drop down as the lens mounting frame is fixed by the notches when the lens mounting frame is used by springing it up. The need for retightening of the screws is eliminated and since the frame is fixed by the notches of the member, the simple and stable springing up of the lens mounting frame is made possible.