The present disclosure provides a display panel, a manufacturing method thereof, and a display device. The display panel includes: a display functional layer; a functional electrode layer located at a side of the display functional layer; and a transparent conductive layer located at a side of the functional electrode layer away from the display functional layer and electrically coupled to the functional electrode layer, the transparent conductive layer at least including a metal layer and a transparent metal oxide conductive layer, and a thickness of the transparent metal oxide conductive layer being greater than a thickness of the metal layer.