An organic light emitting diode display is provided, which selectively disconnects one section of a scan line to darken a defective pixel when a defect occurs in a pixel provided with Thin Film Transistors (TFTs). The organic light emitting diode display includes four subpixel regions arranged in a 2×2 matrix on a substrate, a first horizontal scan line, a second horizontal scan line, a first vertical scan line, and a second vertical scan line. The first horizontal scan line passes through first and third subpixel regions. The second horizontal scan line passes through second and fourth subpixel regions. The first vertical scan line and the second vertical scan line connect the first horizontal scan line and the second horizontal scan line.