To provide a thin-film solar cell module capable of preventing damage to a cell and a contact line.A thin-film solar cell module of the present invention has a characteristic that it provides a cell module having a plurality of cell strings bidirectionally connected to each other in parallel, the cell strings each having a plurality of cells connected to each other in series via a contact line, wherein when an output from the cell module is P (W), an output from one of the cell strings is Ps (W), and an area of the contact line is Sc (cm2) under a condition of light source: xenon lamp, irradiance: 100 mW/cm2, AM: 1.5, and temperature: 25° C., (P−Ps)/Sc is 10.7 (kW/cm2) or less, Ps is 12 W or less, and P is 385 W or less.