Provided is a stacked package of a semiconductor device and a method of manufacturing the same. The stacked package of a semiconductor device may include at least one first semiconductor chip, at least one second semiconductor chip, at least one interposer between the at least one first semiconductor chip and the at least one second semiconductor chip, and a third semiconductor chip on the at least one first semiconductor chip. The at least one first semiconductor chip and the at least one second semiconductor chip may be configured to perform a first function and a second function and each may include a plurality of bonding pads. The third semiconductor chip may be configured to perform a third function which is different from the first and the second functions. The package may further include external connection leads may be configured to electrically connect the third semiconductor chip to the outside.