A semiconductor package may include a lower package including a first substrate, a first semiconductor chip on the first substrate, and a first molding portion on the first substrate to cover the first semiconductor chip, an interposer substrate on the first semiconductor chip, a supporting portion between the interposer substrate and the first substrate to support the interposer substrate, a connection terminal connecting the interposer substrate to the first substrate, and an upper package on the interposer substrate. The upper package may include a second substrate, a second semiconductor chip on the second substrate, and a second molding portion on the second substrate to cover the second semiconductor chip.