ENA dialogue in M. Buber’s philosophy has a peculiar sense. Disclosing specific features of a dialogue the author marks out its three types: a monologue hiding under the cover of a dialogue, a technical dialogue and a real dialogue. Being presented I-YOU and I-IT dialogic and non-dialogic relations, in contrast to M. Buber M. Heideger is not a “dialogue philosopher”. His treatment of a dialogue is more phenomenologic. Trying to reach the authenticity of speech he reveals his attitude toward the truth.