To provide an optical member for stereoscopic image display which reduces the occurrence of moire, and also to provide a stereoscopic image display device.

The optical member for stereoscopic image display has a polarization axis control plate 180. The polarization axis control plate 180 has: a first polarization area 181; a second polarization area 182; and a polarization axis control plate area light shielding part 183 provided in a position corresponding to an image production area light shielding part 163, in a boundary part between the first polarization area 181 and the second polarization area 182 and shielding the whole or a part of image light for a right eye and image light for a left eye. The polarization axis control plate 180 emits the incident image light for a right eye and the incident image light for a left eye as linearly polarized lights whose polarization axes are orthogonal to each other or circularly polarized lights whose rotational directions of the polarization axes are opposite to each other, when the image light for a right eye and the image light for a left eye are made incident on the first polarization area 181 and the second polarization area 182 respectively. Microbeads are added to the polarization axis control plate area light shielding part 183.