The present inventive concept relates to a solar cell, a unit cell included in the solar cell, and a method for manufacturing the solar cell, the solar cell comprising: a first unit cell manufactured using any one piece from among a plurality of pieces formed by separating a mother substrate; and a second unit cell coupled to the first unit cell, wherein the first unit cell comprises a first cell electrode provided on a first unit substrate and having conductivity, the second unit cell comprises a second cell electrode provided on a second unit substrate and having conductivity, and the second cell electrode and the first cell electrode are bonded to each other without a bonding material to couple the second unit cell to the first unit cell.