A thin film transistor array substrate and a display panel are provided. A parasitic capacitor is formed from a common line and a data line, and a capacitance value of the parasitic capacitor formed from the data line connected to the connecting line with a larger resistance value and the corresponding common line is less than that of the parasitic capacitor formed from the data line connected to the connecting line with a smaller resistance value and the corresponding common line. Thus the displayed image bright stripes with inconsistent brightness can be avoided from appearing.