A camera module that includes a housing within a lens module is positioned that contains one or more lenses and an actuator assembly that is configured to drive the lens module in an optical axis direction is provided. The actuator assembly includes a guide unit that is positioned between the housing and the lens module. The guide unit comprises a polymer composition that includes a polymer matrix containing an aromatic polymer, wherein the polymer composition exhibits a flexural modulus of about 7,000 MPa or more as determined in accordance with ISO Test No. 178:2010 at 23° C. and a Rockwell surface hardness of about 25 or more as determined in accordance with ASTM D785-08 (Scale M).