Disclosed is a mount support structure for readily supporting and fixing a solar cell module to a mount. A module side connector is arranged downside of a lower face of the solar cell module in two places and a hook fixture is arranged upside of a lower face of a flexible frame, a mount side connector is arranged in two places of lengthwise end and intermediate portion of module support frame located below of a parallel pair arranged on a slanted face of the mount, a hook receiving hole is arranged on a back face of the module support frame, and pressing downward the solar cell module, with the hook fixture rotatively latched in the hook receiving hole, allows for output connection and mount fixture by coupling the module side and the mount side connectors, subsequently for fixing the solar cell module to the mount.