The earthen ware vessels in the Neolithic era of our country are classified into Yunggimun earthenware, which is pre-slant line patterned earthenware, and the slant line patterned e;rthenware, which has four regional groups according to the shape of the earthenware and the form of the patterns : Midwestern, Southern, Northeastern and Northwestern. Yunggimun earthenware had already been used in the districts of Dongsamdong and Sangnodaedo before the slant line patterned earthenware was introduced. It w;s manufactured and used mostly in Pusan, Kimhae, and the Islands of Namhae and even as far as Osanri to the north and Soheugsando lying in the westernmost area. The earthenware in the Midwestern district has the most classical shape and the slant tine patterned earthenware in the Southern district is the same as that in the 1Vlidwestern district in the respect that the bottom is round, but there is a great difference between them in the respect of the change in the contents and position of patterns. The earthenware in this district had patterns at first only around the mouth and then on the whole surface and then again only around the mouth and at last had no patterns. The slant line patterned earthenware vessels in the Northeastern and Northwestern districts are not so clearly classified as those with round bottoms in the Midwestern and Southern districts. The most distinctive feature of the earthenware vessels in these districts is that very few of them have patterns on the whole surface and most of them have patterns only on the part except around the mouth and on the lower part. Paengihyeong earthenware belonging to the Northwestern group and Kongyeol earthenware belonging to the Northeastern group appeared following the slant line patterned earthenware. They appeared earliest in the ago of the patternless earthenware. Paengihyeong earthenware vessels were distributed to the south only in Pyeongannamdo and Hwanghaedo, not covering the south of the Yeseong River. river basin, and then it extended even to Pusan. Jeomtodae earthenware representing the latter period of the Musan earthenware ago was manufactured and used first in the Han River basin. The earthenware vessels in the early days of Koguryeo dynasty are, for the most part, Kalsaegmayeon and I-Ieugsaegmayeon earthenware for med with the material made by working clay mixed with some sand by the Seorigi method, and then baked in oxidizing flame at a low temperature. But the earthenware vessels in the latter period are mostly the black ash colored vessels and the light ash colored ones, hard in quality. "They formed the vessels with the soft ground earth by using a spinning wheel and baked them in the airtight kiln at a high temperature. Paekje earthenware vessels can be classified into three according to tlae degree of burning temperature : Yeonjil, Pyeongjil and Kyeongjil. Kyeongjil earthenware has its origin in the fact that they began to make new Kyeongjil earthenware by introducing the earthenware manufacturing method from Han of China and Koguryeo from about the first century A. D. on. From the fifth century A. D. on, they manufacdtured and used new earthenware vessels such as Samjog earthenware, Janggohyeonggidae with patterns like a bracken, Tohyeon, and Jeongbyeong, as the result of active contact with 1Vamjo in the Hwanam district of China. And during the last period, they made Siyugi by putting artificial glaze on Kyeongjil of Tojil earthenware. Shilla earthenware was formed with the ground earth with strong viscosity and iron, and then it: was baked at a high temperature of 1000?1200?. It is watertight with glaze because silicic acid contained in the ground earth became glassy. Anc9 it is herd next to porcelain among the china and porcelain. Its color is gray-black or gray-blue. Surface decoration of Shilla earthenware had no patterns in the fourth century, but in the fifth century geometrically lined patterns engraved in intaglio by a sharp bamboo kni