Sergei Prokofiev experimented with styles which shocked the public because his ideas were far ahead of his time. In the 1930's, the Soviet composer turned to a neoclassical style. His Sonata, Opus 119, for violoncello and piano, is a product of this final period of composition. The purpose of this study is to determine the stylistic characteristics of this sonata. This study includes a detailed description of the compositional techniques Prokofiev used in this work. These techniques are categorized according to the basic stylistic elements. The sources of data are comprised of the score of Prokofiev's Sonata, Opus 119, as well as books on twentieth-century music and on Prokofiev as a man and as a composer. The score was used for purposes of analysis.