Polish composer Witold Lutos?awski (1913-1994) was one of the most representative composers of the twentieth-century. Lutos?awski’s style progressed from traditional to modern avant-garde. His Piano Sonata belongs to his first compositional period, and is the only extant work from his student years. His remarkable synthesis of classical structures and impressionistic harmonic sonorities distinguishes the Sonata. Lutos?awski’s Piano Sonata is divided into three movements, and each movement is written in traditional sonata allegro form, sonata form without development and modified sonata form respectively. The Sonata contains both considerable elements of Classicism and Impressionism, as well as traits of Post-romanticism and Neoclassicism. The evolution of Lutos?awski’s compositional language can be better understood through an in-depth study of his Piano Sonata. Although Lutos?awski did not allow the work to be published during his lifetime, this occurred posthumously, ten years after the composer´s death. The recent publication of the work, paired with its substantial technical demands, both account for the fact that the Sonata is not frequently performed. The complex textures of Sonata place extensive technical and musical demands on the performer. In this study, a detailed description of the composer´s early style and influences as relates to this work will be analyzed and technical and pianistic approaches necessary for a performance of the work will be addressed. Also, there are significant discrepancies between the manuscript and printed score, even though the edition is based on the manuscript. Only one manuscript survives and scholarly research involving the work is scarce. Discrepancies between the manuscript and the published edition will be detailed, with suggestions for performance. It is hoped that this study will provide interest and be conducive to better approach the performance of this Piano Sonata.