A display device and an inverter therefor are disclosed. The inverter has a main circuit board having a plurality of first circuit patterns and a plurality of second circuit patterns formed on a first side thereof, and a sub circuit board having first connecting patterns corresponding to the plurality of first circuit patterns formed on one side of the sub circuit board and second connecting patterns corresponding to the plurality of second circuit patterns formed on a second side thereof. The plurality of first circuit patterns are coupled with each other through the first connecting patterns, and the plurality of second circuit patterns are coupled with each other through the second connecting patterns. Thus, the present invention provides an inverter and a display device having the same, which are capable of being manufactured at a low production cost.