An active matrix organic electroluminescent display device includes a substrate, a gate line disposed on the substrate, a data line disposed on the substrate crossing the gate line to form a pixel region, a first switching thin film transistor disposed on the substrate and electrically connected to the gate line and the data line, a first driving thin film transistor disposed on the substrate and electrically connected to the first switching thin film transistor, a capacitor electrode formed on the substrate and electrically connected to the first switching thin film transistor, the capacitor electrode having first and second parts disposed in parallel to the data line, and a third part connecting a first end of the first part to a first end of the second part, a power line electrically connected to the first driving thin film transistor, the power line having first, second, and third portions overlapping the capacitor electrode to form a storage capacitor, a pixel electrode disposed within the pixel region and electrically connected to the first driving thin film transistor, an organic emissive layer disposed on the pixel electrode, and a partition wall disposed between adjacent organic layers to overlap the data line and the first and second parts of the capacitor electrode.