The article deals with the problem of internal unity and evolution of Rachmaninoff’s romances. There is an attempt to make a notion of composer’s lyric deeper and to place this notion as a central stuff of whole his music what is demanded by interpretation of vocal chamber Rachmaninoff’s works. A similar problem was widely discussed in the musicology literature, but there Rachmaninoff’s lyric often linked with common things such as affectivity, openness, accessible to perception, love and nature themes. We think that the Rachmaninoff’s music is lyric from the inside as well and this means its special poetics. By the vocal pieces in the article discovered music phenomena of Rachmaninoff’s lyric and showed, through which structural features and music style elements reached the lyric mood of composer’s romances.