A bifacial solar cell includes a substrate; a first conductive type region having a conductive type different from a conductive type of the substrate; a first insulating layer formed on the first conductive type region; a plurality of first electrodes contacting the first conductive type region through the first insulating layer and extended in a first direction; a plurality of first current collectors extended in a second direction crossing the first direction, wherein the plurality of first current collectors are electrically and physically connected to the plurality of first electrodes; a second conductive type region having a conductive type the same as the conductive type of the substrate, and having an impurity concentration that is higher than an impurity concentration of the substrate; a second insulating layer formed on the second conductive type region; a plurality of second electrodes contacting the second conductive type region through the second insulating layer and extended in the first direction; and a plurality of second current collectors extended in the second direction.