Jun ware (Chinese: 鈞窯; pinyin: Jūn yáo; Wade–Giles: Chün-yao) is a type of Chinese pottery, one of the Five Great Kilns of Song dynasty ceramics. Despite its fame, much about Jun ware remains unclear, and the subject of arguments among experts. Several different types of pottery are covered by the term, produced over several centuries and in several places, during the Northern Song dynasty (960–1127), Jin dynasty (1115–1234) and Yuan dynasty (1271–1368), and (as has become clearer in recent years) lasting into the early Ming dynasty (1368–1644).
Some of the wares were for a popular market, especially the drinking vessels, but others seem to have been made for the imperial court and are known as "official Jun wares"; they are not mentioned in contemporary documents and their dating remains somewhat controversial. These are mostly bowls for growing bulbs or flower-pots with matching stands, such as can be seen in many paintings of scenes in imperial palaces. The consensus that seems to be emerging, driven largely by the interpretation of excavations at kiln sites, divides Jun wares into two groups: a large group of relatively popular wares made in simple shapes from the Northern Song to (at lower quality) the Yuan, and a much rarer group of official Jun wares made at a single site (Juntai) for the imperial palaces in the Yuan and early Ming periods. Both types rely largely for their effect on their use of the blue and purple glaze colours; the latter group are sturdy shapes for relatively low-status uses such as flowerpots and perhaps spitoons.