Sun Yu (March 21, 1900 – July 11, 1990) was a major leftist film director active in the 1930s in Shanghai. One of the core directors of the Lianhua Film Company, Sun Yu made a name for himself with a series of socially conscious dramas in the early to mid-1930s. After the Japanese invasion of China in 1937, Sun Yu made his way to the interior, where he continued to make films glorifying the war effort against the Japanese.