A number of distinguished Thai short stories from 1964 to 1973 revealed new and distinctive features in terms of subject, form, concepts, and style. These features were similar to those of Modernism, which was an international movement in literature and the arts that began in the late 19th century and continued into the early 20th century. The similarity suggests the direct and indirect influences of the modernist styles upon Thai writers. Furthermore, the change in style of some of the short stories indicates a relationship with the art movement: Impressionism, Expressionism, Cubism, Surrealism, which were subsidiary art movements within Modernism. These specific features of the Thai short stories signify a radical break with traditional writing of the time.