A stereoscopic imaging device, wherein the aperture controller performs a second aperture control in which the larger the amount of shake detected by the shake detector becomes, the further the amount of opening of the aperture unit increases than the amount of opening required for the first aperture control. The present invention allows to shallow a depth of focus and to increase the amount of parallax by further opening an aperture as the amount of shake becomes larger, so that an influence on a parallax is reduced even when the amount of shake is large, thereby maintaining a stereoscopic effect.