NOVELTY - Gel layer formation non-hardened silicone rubber adhesive bond layer is formed on outer peripheral portion of front side panel and back side panel. Photovoltaic cell string which connects several solar cell elements containing semiconductor substrates is placed, front side panel and back side panel are pinched, silicone rubber adhesive bond layer is cured and front side panel and back side panel or sheet are cured while burying and sealing the photovoltaic cell string in both silicone rubber or gel layer, to obtain solar-cell module.    USE - Manufacture of solar-cell module (claimed).    ADVANTAGE - The solar-cell module is manufactured without taking in foam. The destruction of solar cell element in the solar-cell module is prevented.    DETAILED DESCRIPTION - A front side panel is prepared by coating and curing liquid silicone rubber or gel composition on single side of transparent panel where sunlight enters and forming silicone rubber or gel layer. A back side panel or sheet is prepared by coating and curing liquid silicone rubber or gel composition on single surface of panel or sheet side opposite to surface at which sunlight enters and forming silicone rubber or gel layer. Gel layer formation non-hardened silicone rubber adhesive bond layer of silicone rubber(s) hardened by hydrosilylation reaction in frame shape is formed on outer peripheral portion of front side panel and back side panel or sheet. Photovoltaic cell string which connects several solar cell elements containing semiconductor substrates clamped between silicone rubber or gel layer of front side panel or silicone rubber or gel layer of back side panel or sheet is placed at 60-200 degrees C under vacuum and front side panel and back side panel or sheet are pinched, silicone rubber adhesive bond layer is cured, and front side panel and back side panel or sheet are cured while burying and sealing the photovoltaic cell string in both silicone rubber or gel layer, to obtain solar-cell module.