A flexible display device comprising a flexible substrate, the flexible display device further comprising: a display region (A/A) positioned on a front surface of said flexible substrate in top view of the flexible display, the display region (A/A) including pixels to display images, each of the pixels including an organic light emitting diode (OLED) configured to receive a signal from a signal line (141a, 141b, 141c) and power from a power line (145a, 145b, 146a, 146b, 147a, 147b) to display the images; a non-display region (N/A), positioned on said surface of said flexible substrate outside the display region (A/A), where images are not to be displayed; the non-display region (N/A) including: a circuit mount region comprising a driving circuit configured to supply the signal through the signal line (141a, 141b, 141c) and the power through the power line (145a, 145b, 146a, 146b, 147a, 147b) to each of the pixels and a bending region (B/A) formed between the display region (A/A) and the circuit mount region and configured to be bent flexibly, characterized in that the non-display region (N/A) between the circuit mount region and the display region (A/A) is divided into a first area positioned between the bending region (B/A) and the display region (A/A), wherein the first area is positioned on the front surface of the flexible display device, and a second area positioned between the bending region (B/A) and the circuit mount region, and wherein by bending of the bending region (B/A) the first area is positioned on the front surface in top view of the flexible display device while the second area is positioned on a rear surface in top view of the flexible display device, and the signal line (141a, 141b, 141c) and the power line (145a, 145b, 146a, 146b, 147a, 147b) are formed on a same layer in the bending region (B/A). a display region (A/A) positioned on a front surface of said flexible substrate in top view of the flexible display, the display region (A/A) including pixels to display images, each of the pixels including an organic light emitting diode (OLED) configured to receive a signal from a signal line (141a, 141b, 141c) and power from a power line (145a, 145b, 146a, 146b, 147a, 147b) to display the images; a non-display region (N/A), positioned on said surface of said flexible substrate outside the display region (A/A), where images are not to be displayed; the non-display region (N/A) including: a circuit mount region comprising a driving circuit configured to supply the signal through the signal line (141a, 141b, 141c) and the power through the power line (145a, 145b, 146a, 146b, 147a, 147b) to each of the pixels and a bending region (B/A) formed between the display region (A/A) and the circuit mount region and configured to be bent flexibly, characterized in that the non-display region (N/A) between the circuit mount region and the display region (A/A) is divided into a first area positioned between the bending region (B/A) and the display region (A/A), wherein the first area is positioned on the front surface of the flexible display device, and a second area positioned between the bending region (B/A) and the circuit mount region, and wherein by bending of the bending region (B/A) the first area is positioned on the front surface in top view of the flexible display device while the second area is positioned on a rear surface in top view of the flexible display device, and the signal line (141a, 141b, 141c) and the power line (145a, 145b, 146a, 146b, 147a, 147b) are formed on a same layer in the bending region (B/A).