To prevent damage by a flying object by erecting a transparent panel by interposing a proper space at least on one side of a stained glass panel.

A horizontal hole Y is bored in a gravestone B. Next, a stained glass panel installing tool 1 having a stained glass panel 3 having a setting block 3a by crack preventive rubber on the outer periphery and a transparent panel 5 by a polycarbonate resin arranged on the side of a holder is inserted into a central part in this horizontal hole Y, and bolts of respective support parts 2a are rotated by a spanner to be erected on an inside surface of the horizontal hole Y. Then, a space part KU of an inside surface of this horizontal hole Y and an outer peripheral surface of a fixing frame 2 is sealed by mortar. Thus, even vibration when a vehicle such as a large car passes can be reliably absorbed by a setting block, a flying object is received by the transparent panel even when the flying object such as a small stone comes flying, the stained glass panel can be protected without directly striking on the stained glass panel, dewing can be eliminated by a ventilating hole arranged in a space K1, and the stained glass panel can be used for a long period.