Cheng Jiasui (1565-1643) was a Chinese landscape painter and poet during the Ming dynasty (1368–1644). Cheng was born in Xiuning in the Anhui province and lived in Jiading. His style name was 'Mengyang' (孟阳) and his pseudonyms were 'Songyuan' (松圆) and 'Ji'an' (偈庵). Cheng's landscape painting followed the style of Huang Gongwang and Ni Zan in its wild and natural taste. Cheng also wrote a number of poems. Along with Tang Shisheng (唐时升), Lou Jian (娄坚), and Li Liufang (李流芳), he was known as one of the "Four Teachers of Jiading" (嘉定四先生).