A package structure including an insulating encapsulation, at least one semiconductor die, at least one first antenna and at least one second antenna is provided. The insulating encapsulation includes a first portion, a second portion and a third portion, wherein the second portion is located between the first portion and the third portion. The at least one semiconductor die is encapsulated in the first portion of the insulating encapsulation, and the second portion and the third portion are stacked on the at least one semiconductor die. The at least one first antenna is electrically connected to the at least one semiconductor die and encapsulated in the third portion of the insulating encapsulation. The at least one second antenna is electrically connected to the at least one semiconductor die and encapsulated in the second portion of the insulating encapsulation.