This study focused on clarifying the functions and types of speech titles. In this study, the speech titles are regarded as an important component of the speech discourse, and the functions and the types of speech titles have been analyzed in relation to the speech discourses. It has been demonstrated that the main function of speech titles is to show the topic and the theme of the speeches. In addition, it has been revealed that speech discourses directly accept the titles as the topic or the theme. This study suggests that the speech titles should be written in a direction that directly indicates the topic or the theme of the speeches.