A heat sink includes a body (10) having two pairs of sections intercrossed at a central portion thereof to form a cross profile when viewed from a top of the body. Each section includes a top surface (12), a bottom surface (14), a vertical surface (16) and a guiding surface (18) opposing the vertical surface. The vertical surface and the guiding surface are extended between the top and bottom surfaces. A thickness of each section increases gradually from the top surface to the bottom surface. A plurality of spaced fins (30) extend from the guiding surface of each of the sections in directions perpendicular to the vertical surface of the corresponding section. Each section has a stand protruding downwardly from the bottom surface adjacent the central portion of the body. The stands of the sections cooperatively form a heat receiving portion (20) for contacting with a heat generating component.