The title compound, C(20)H(19)O(2)PSe or SePPh(2-OMe-C(6)H(3))(2), crystallizes with two distinct orientations for the meth-oxy groups. The Se=P bond is 2.1170 (7) Å and the cone angle is 176.0°. Intra-molecular C-H⋯Se inter-actions occur. In the crystal, mol-ecules are linked by inter-molecular C-H⋯Se inter-actions.