A semiconductor package having a thinner shape and including an antenna is provided. A semiconductor package comprises a first substrate, a second substrate on the first substrate and including a first face facing the first substrate and a second face opposite to the first face, a pillar extending from the second face of the second substrate to the first substrate, and a first semiconductor chip on the second face of the second substrate and connected to the pillar. The second substrate may include an antenna pattern, and the antenna pattern may be connected to the first semiconductor chip, and may be on the second face of the second substrate such that the antenna pattern is isolated from direct contact with the first semiconductor chip.