A display panel and a display device are provided. The display panel includes a display region; a light transmitting region at a side of the display region or surrounded by the display region; a first dummy region between the display region and the light transmitting region, the first dummy region being a non-light emitting region; a first signal line in the display region and the first dummy region; a display pixel unit in the display region and including a display pixel circuit; and a first dummy pixel unit in the first dummy region and including a first dummy pixel circuit, the display pixel circuit is connected with the first signal line, and the first dummy pixel circuit is connected with the first signal line.