A ribbon for a photovoltaic module includes a plurality of first interconnection ribbons connected to one solar battery cell, a plurality of second interconnection ribbons connected to another solar battery cell, and a bus ribbon through which the first and second interconnection ribbons are connected. In the ribbon, the bus ribbon includes a first ribbon connecting portion connected to the plurality of first interconnection ribbons, a second ribbon connecting portion connected to the plurality of second interconnection ribbons, and a string connecting portion connected between the first and second ribbon connecting portions. Accordingly, it is possible to decrease resistance at the connected portion between the bus ribbon and the interconnection ribbon and to minimize loss caused by serial resistance, thereby improving the power and light conversion efficiency of solar battery cells.