A semiconductor package includes a first semiconductor chip, a second semiconductor chip disposed on the first semiconductor chip and including a through-silicon via electrically connecting a front pad and a rear pad, a dielectric layer having a first region covering a side surface of the second semiconductor chip and a second region filling space between the first semiconductor chip and the second semiconductor chip, a first through-via penetrating through the first region of the dielectric layer, and a second through-via penetrating through the second region of the dielectric layer.