To permit spectacles with any kind of shape to be attachable/detachable and to enable using them as a disposable by providing attachable/detachable mechanisms using a sucker which can be fitted, removed and adjusted in a fitting position in the both symmetric end parts without disturbing a visual field.

A spectacles protecting cover mainbody 2 is formed by a transparent synthetic-resin sheet round holes 3 for fitting are provided in a straight line in the both symmetric end parts of the spectacles protecting cover mainbody 2. Joining tools 1 are made by flexible, elastic and transparent material quality and are fitting parts with a sucker at one side and a groove in parallel with a sucker surface at the other side and the fitting parts are connected to the suckers 5 by thin shafts. After the semi-spheres of the joining tools 1 are brought into pressurized contact with the round holes 3 in a half blanking state so as to be penetrated, the joining tools 1 are pushed-in till the grooves meet the cross sections of the round holes 3. At this time, the joining tools 1 are flexible and elastic so that the semi-spheres are deformed so as to pass through the round holes 31 and disks become the stopper of pushing-in. The suckers 5 of the joining tools 1 are stuck on the spectacle lenses 10 and a spectacles protecting cover is mounted on the spectacles.