A solar cell module securing structure includes a solar cell module, a first securing member that supports the solar cell module, a second securing member that includes an installation connecting portion having an installing portion on which the first securing member is installed, an inclined connecting portion extending from the installation connecting portion, and an abutting portion that is bent from the inclined connecting portion so as to extend along a structural surface of a roof structural member, and spacer members which are laminated between the first securing member and the second securing member at multiple stages. Further, a long hole portion having a long hole shape, which penetrates through the installing surface, is formed on the installing portion of the installation connecting portion, thereby making fine adjustment of a securing position of the first securing member with respect to the second securing member.