A printed circuit board includes: a core insulating layer including a glass fiber; a first insulating layer on an upper portion or a lower portion of the core insulating layer, the first insulating layer including a first circuit pattern groove; a first circuit pattern filling the first circuit pattern groove of the first insulating layer; a second insulating layer covering the first circuit pattern and including a second circuit pattern groove at a top surface thereof; and a second circuit pattern filling the second circuit pattern groove of the second insulating layer, wherein the first insulating layer includes a resin material and a filler distributed in the resin material. Accordingly, a total thickness of the PCB can be thinly formed while maintaining the stiffness by separately forming a thin insulating layer without a glass fiber for the buried pattern on the core insulating layer.