Provided is a stack-type semiconductor package comprising a first semiconductor package with a first package substrate and a logic chip mounted thereon, a second semiconductor package including a second package substrate disposed on the first semiconductor package and first and second memory chips stacked on the second package substrate, and connection pads disposed between the first and second package substrates to connect the first and second semiconductor packages electrically to each other. The first package substrate has first and second edges that are substantially perpendicular to each other. The first package substrate may include first DQ connection pads electrically connected to the first memory chip, and second DQ connection pads electrically connected to the second memory chip. The first DQ connection pads may be arranged adjacent to the first edge and the second DQ connection pads may be arranged adjacent to the second edge.