An autostereoscopic image display apparatus according to an embodiment includes: a plane display device including pixels arranged in a matrix form; and an optical plate provided in front of the plane display device to control light rays illuminated from the pixels. The optical plate includes: first and second substrates, each being transparent to light; liquid crystal sandwiched between the first substrate and the second substrate; first electrodes arranged periodically on a first plane of the first substrate opposed to the second substrate; second electrodes disposed on the first plane of the first substrate and between the first electrodes adjacent to each other; a third electrode provided on a second plane of the second substrate opposed to the first substrate; and at least one spacer provided between the first substrate and the second substrate to hold a space between the first substrate and the second substrate. The spacer is disposed on the first electrode.