An illumination device (100) includes a heat sink (10), at least one solid-state lighting source (20) and a printed circuit board (30). The heat sink (10) includes a support portion (11). The solid-state lighting source (20) includes a light-emitting surface (22) and a bottom surface (24) opposite to the light-emitting surface (22). The bottom surface is mounted on the support portion of the heat sink. The printed circuit board includes a circuit and at least one through hole (32) for receiving the solid-state lighting source. The circuit of the printed circuit board is electrically connected with an electrode of the solid-state lighting source.
