A 3D display screen and a 3D display device are provided. The 3D display screen comprises a pixel array comprising m laterally displaced groups. The laterally displaced group includes n rows of sub-pixel units, the sub-pixel units in a same sub-pixel unit row are arranged in a first lateral direction, m is a positive integer larger than or equal to 1, and n is a positive integer larger than or equal to 2. The sub-pixel unit includes a plurality of light-shielding stripes, and two adjacent light-shielding stripes have a gap of P in the first lateral direction. Along the first lateral direction, the nth sub-pixel unit row has a lateral displacement of P with respect to the 1st sub-pixel unit row, the ith sub-pixel unit row has a lateral displacement of P/n with respect to the (i−1)th sub-pixel unit row, where i is a positive integer and 1