A thin film solar cell module includes a substrate; a plurality of first cells positioned in a central region, where one or more first cell include at least one photovoltaic unit; and a plurality of second cells positioned in edge regions of the substrate, where one or more second cell include at least one photovoltaic unit. Among the photovoltaic units positioned in the same layer the photovoltaic unit of the one or more second cells have higher band gap energy than that the photovoltaic unit of the one or more first cells.