Methods and apparatus are provided for processing a message in an electronic device. A first message application is executed, which displays a first message and a second message in a combined message display window of an interlocutor. A second message application is executed, which provides the second message to the first message application while the first message application is executed. The first message is received and/or transmitted through the first message application, and the second message is received and/or transmitted through the second message application. The first message application and the second message application have different message reception and transmission techniques.