Disclosed is a display panel including: a flexible substrate; a buffer layer disposed on the flexible substrate; a pixel disposed on the buffer layer and comprising a thin film transistor and an image device connected to the thin film transistor; a barrier layer disposed on the flexible substrate to protect the pixel from a substance from the flexible substrate; and a diffusion prevention layer disposed between the barrier layer and the buffer layer and configured to prevent hydrogen generated from the barrier layer from being diffused into the thin film transistor.