A transistor substrate is provided. The transistor substrate includes a plurality of data lines and a plurality of scan lines. The scan lines intersect with the data lines to define a plurality of pixel units. One of the pixel units includes a first electrode, a second electrode and a switching transistor. The first electrode has a slit including a major axis portion and a curved portion connected to the major axis portion. One of the first electrode and the second electrode is used for receiving a pixel voltage signal, and the other is used for receiving a common voltage signal. The switching transistor includes a switching electrode. The switching electrode and the curved portion of the slit have an overlapping region, and an area of the overlapping region is 0.2 times to 0.8 times an area of the curved portion.