Solar battery and solar battery module

A solar cell module comprising:

• a solar cell;
• a wiring member;
• a back side protecting member;
• and
• an encapsulant, wherein
• the solar cell comprises:
• a cell main body part comprising a back electrode and a photoelectric conversion section, the back electrode being arranged on a back surface of the photoelectric conversion section;
• and
• a metal film disposed in contact with the back electrode of the cell main body part, and wherein
• the back electrode comprises a plurality of projections or recesses with an arithmetic mean roughness of more than 0.1 μm,
• the metal film has an arithmetic mean roughness of more than 0.1 μm on a surface contacting the back electrode,
• the metal film covers at least 10% of a back surface of the cell main body part,
• the wiring member is connected to the back surface of the cell main body part, and
• the encapsulant is disposed between the metal film and the back side protecting member.