We report CW laser beam self-pumped phase conjugation (SPPC) induced by aphotorefractive waveguide created by SPPC of CW mace- locked laser radiation inphotorefractive crystal Cu: KNSBN. After a waveguide is created in the crystal by usingthe second harmonic of a CW mode-locked Nd: YAG laser at 532 urn, self--pumped phaseconjugation can be achieved by using the same wavelength CW laser beam at some incidenceangles where SPPC cannot be achieved by using the CW laser beam alone. The lifetime ofthe photorefractive waveguide is longer than 30 minutes under dark conditions.