The research deals with the linguistic analysis of promises in the Glorious Quran. Keeping promises is an important aspect of human life and Islam lays great emphasis on the fulfillment of promises. Breaking a promise is a bad manner as they facilitate social coordination and cooperation. A promise is a declaration that one will or will not do something. It is either explicitly or implicitly used in the Glorious Quran. In this study, promises are identified in (106) verses and classified into nouns, verbs and adjectives. Types of these nouns, verbs and adjectives are also identified and interpreted. Characteristics of the promises in the Glorious Quran are linguistically described. Finally, conclusions concerning promises are provided.