The article touches upon different aspects of promise – as a speech act, as a means of communication. The theme of promise is analysed in its relation to various areas of philosophical studies: the problem of the subject’s identity, the problem of society as a system of interpersonal interactions, the problem of performative utterances and etc. The methodological basis includes primarily the speech act theory developed by J. Austin and J. Searle’s speech-act theory, genetically related to it. Interpretation of promise in its ontological aspect is considered mainly by comparing the views of F. Nietzsche, J. Derrida and P. Ricoeur.