The present disclosure provides an array substrate, a display panel and a display device. The array substrate comprises: a plurality of pixel units arranged in rows and columns; and a plurality of cascaded shift register units, the plurality of shift register units and the rows of pixel units having one-to-one correspondence therebetween. The shift register unit comprises a plurality of shift register elements, and for each shift register unit, at least one shift register element in the shift register unit is provided within at least one pixel unit among the row of pixel units corresponding to the shift register unit. A width of a non-display region occupied by the shift register units of the present disclosure is reduced, which is beneficial to realization of a narrow bezel.