Even if the roles of apparatuses are not decided in advance when automatically setting communication parameters, communication parameter setting processing and network joining processing are appropriately executed without requiring the user to select the roles of apparatuses. The invention is characterized by a communication method for a communication apparatus, including a first search step of searching for a communication partner apparatus on a predetermined communication channel, a second search step of searching for a communication partner apparatus on all communication channels available for communication, and a search control step of searching for a communication partner apparatus using the first and second search steps.