We have succeeded in preparing Li-intercalated Bi-based oxychlorides with the layered structures Li_xBiOCl and Li_xBiPbO₂Cl(0≤x≤1) by means of the chemical technique using a solution of n-buthyllithium in hexane and the electrochemical one. In the case of the chemical technique for both BiOCl and BiPbO₂Cl, the host samples have turned black gradually and the electrical resistivity has decreased with increasing treatment-time. However, the temperature dependence of the electrical resistivity has still remained semiconductive. From the powder x-ray diffraction and ICP analyses, the products have been found to be of the single phase within the Li-content of 0≤x≤1. The time required for the Li-intercalation by the electrochemical technique has been a fraction of that by the chemical technique.