An electronic holographic display device includes: a beam emitting device; a plurality of polarizing beam splitters; a plurality of spatial light modulators, each of which is disposed with prescribed distances therebetween and modulates a beam vertically made incident from the corresponding polarizing beam splitter; a magnifying optical system; and a reducing optical system. The magnifying optical system includes a first lens array and a second lens array. The reducing optical system includes a third lens array and a fourth lens array. A distance “a” between the spatial light modulator and the first lens is represented by a=(k+2)f0/(k+1), wherein a ratio “k” is a distance between two adjacent spatial light modulators, to a size of the spatial light modulator, and f0 is a focal point distance of the first lens.