A write head of optical printer utilizing the principle of a vacuum fluorescent display device which is capable of forming a sufficient grid gap between each adjacent two grids and accurately and readily accomplishing the arrangement of the grids is disclosed. The write head is constructed in such a manner that grids are arranged above a plurality of parallel strip-like anode conductors arranged on a substrate so as to obliquely cross a row of the anode conductors, phosphor layers are deposited on the anode conductors so as to be opposite to the grids to form light emitting picture cells, and an array of the light emitting picture cells in each grid is formed separately.