A client terminal for conducting wireless communications with an access point apparatus having apparatus unique information. The client terminal includes: an acceptance unit that accepts entry of the apparatus unique information; a conversion unit that converts the apparatus unique information entered through the acceptance unit into temporary connection information; a temporary connection establishing unit that establishes temporary connection with the access point apparatus to acquire main connection information required for main connection with the access point apparatus based on the temporary connection information; a reception unit that receives the main connection information from the access point apparatus; and a main connection establishing unit that establishes main connection with the access point apparatus based on the main connection information.