A connecting device for photovoltaic-capable insulating glass comprises at least one retaining device laterally attached to the photovoltaic-capable insulating glass. In its installed state, the retaining device is open on at least one side which faces the intermediate space so that at least one ribbon is insertable into a clamping device inserted in the retaining device, and wherein the ribbon establishes an electrical contact for a photovoltaic device accommodated in the at least one intermediate space, and wherein the clamping device is provided with an electrical supply line such that the clamping device establishes an electrical clamping contact between the at least one ribbon and the electrical supply line.