Disclosed are an array substrate, a display panel, a display device and a method for manufacturing an array substrate. The array substrate includes a base substrate, comprising a display region and a non-display region surrounding the display region, and the display region of the base substrate is provided with a plurality of pixel units, with each of the pixel units comprising a thin-film transistor; and at least one pressure sensor, which is disposed on the non-display region of the base substrate, and the pressure sensor is disposed in the same layer and made of same materials with an active layer of the thin-film transistor, the active layer includes a channel region and a heavily doped region, and a square resistance of the pressure sensor is larger than that of the active layer.