Song form is one of the most common forms of the Romantic period. Nineteenth century composers frequently use song form either as an independent composition or as a movement of a larger cycle. In romanticism a wide range of song types exists, ranging from form to the internal structure, and for this reason the authors focus their research on the typology of songs, then on aspects related to the internal structure, relations of segments such as contrast and continuity, harmonic and thematic plan, besides to examining the most problematic issues such as the conventions of Classicism in relation to compound song form: exposition-digression-recapitulation, and more. Most examples derive from Frederic Chopin's oeuvre and small instrumental pieces written for piano which illustrate all features relevant to the song form of romanticism.