To provide a solar battery module, a solar battery device facilitating the installation and replacement of the solar battery module, and an installation method and a replacement method for the solar battery device.

A plurality of solar battery modules 51 having first engaging parts 111 and second engaging parts 112 at both end parts in a step roofing direction are arranged in a step roofing manner. The first engaging part 11 of each solar battery module is engaged with the second engaging part 112 of the solar battery module adjacent on the lower side of the solar battery module, and has a handle 113 projected downstream in the step roofing direction. The engagement between the first engaging part 111 and second engaging part 112 is released by pulling the handle 113 downstream.

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