PURPOSE: To provide a method of installing a solar cell on a roof, which lessens a burden which is applied to the roof, executes simply the work for installation and moreover, does not make solar cell modules break even if a strain is generated in the roof by an earthquake.

CONSTITUTION: Anchor bolts 7... are mounted on a roof 20, wires 5 are stretched on these anchor bolts 7..., solar cell modules 1... are coupled with these wires 5 and at the same time, protective members, which are provided under the lower surfaces of the modules 1..., are made to make contact with the surface of the roof to install the modules 1... on the roof.