a projection display apparatus comprises a modulator , an analyzer , and projecting optical system . the modulator includes two - dimensionally arrayed pixel units and it modulates an incident light and emits the modulated light . the analyzer analyzes the emitted light from the modulator . the projection optical system projects the analyzed light from the analyzer . the analyzer includes a polarized beam splitter having a pair of prisms and an adhesive layer held between the pair of prisms . the difference in thickness between thin and thick portions of the adhesive layer is set equal to a predetermined value or less , based on a pixel pitch of the modulator .