Disclosed are a solar cell and a solar cell module using the same. The solar cell module includes a glass frit provided on a support substrate and including sodium, a first solar cell comprising a first back electrode layer, a first light absorbing layer, and a first front electrode layer which are sequentially arranged on the support substrate, and a second solar cell comprising a second back electrode layer, a second light absorbing layer, and a second front electrode layer which are sequentially arranged on the glass frit. The first solar cell is electrically connected to the second solar cell on the glass frit.