In the title compound, C(22)H(30)NO(2)P, the P atom has an irregular tetra-hedral geometry. In the crystal, mol-ecules are connected by N-H⋯O hydrogen-bonding inter-actions, giving rise to a chain along the b axis. The phenyl ring of the anilino group is twisted by 77.40 (16)° relative to the other phenyl ring. The absolute configuration of phospho-rus is S(p).