Disclosed is a solar cell including: a solar cell including an electrode; a wiring portion electrically connected to the electrode of the solar cell; a connection member positioned between the electrode and the wiring portion at a connection portion of the electrode and the wiring portion to electrically connect the electrode and the wiring portion; and an insulating layer covering the electrode entirely where the connection member is not positioned to insulate the electrode and the wiring portion at a portion other than the connection portion. The insulating layer includes an organic solderability preservative (OSP).