<p>An optical modulator component (2) is provided with a modulating substrate (4) composed of an electro-optical material; an optical waveguide (6) arranged on the substrate (4) with at least a pair of splitting sections (6c); and a mutually operating section (11) which applies a voltage to each splitting section (6c) and modulates light that propagates through the splitting sections (6c). On a coupling surface (4b) of the modulating substrate (4), a plurality of end surfaces (15A, 15B, 15C, 15D) of the optical waveguide (6) exist.</p>
