PURPOSE: An LED assembly block and a display device using the same are provided to combine blocks using a joining method using a groove and protrusion and a combining method using magnetic force of a magnet, thereby enabling to easily assemble and dissemble the blocks. CONSTITUTION: An LED assembly block(100) is comprised of a block having more than one surface with no restrictions on the shape of the block as long as the blocks are able to be combined as a three-dimensional structure. A fixing groove(120) is formed on a mounting surface(130). A fixing protrusion(110) is bent in order to combine with a fixing groove boundary edge. A terminal module(170) is installed in all surfaces of the LED assembly block. The terminal module is comprised of a power terminal and a data terminal.
