The aims of this paper are, first, to clarify the different characteristics of the pineapple regions in Taiwan, from self-supporting extensive cultivation in northern counties (hsien_??_) to commercial intensive cultivation in midwestern and southwestern counties, and also a part of Taitung (_??_) County. Second, the writer tries to make clear the forming factors of these different regions of this island. Administrative units found in Taiwan are shih (_??_), chen (_??_), and hsiang (_??_) corresponding to shi (_??_), shô (_??_), and son (_??_) in Japan.<br> The distribution of the pineapple cultivation and its production structure were made clear after dividing it into four major regions. For this division, special emphasis was placed on the condition of cultivation whether it is for sale or for self-supporting. Forming factors of these regional characteristics were also considered.<br> In the case of sale, there are two types. One is that of raw materials for processing and the other is that of fresh fruits. Another type is just for self-supporting. The whole pineapple areas of Taiwan were divided by administrative units into the above-mentioned three types, that is, 1) administrative units with over 50% of pineapple production for processing as raw materials, 2) those with over 60% of production for sale of fresh fruits, and 3) those with over 60% of production for self-supporting. In other words, regions of raw materials for processing, regions of fresh fruits, and regions of self-supporting were established.<br> In general, it is possible to say that Taiwan has four major pineapple regions: northern, midwestern, southwestern, and southeastern. Significant characteristics of the regions will be mentioned below. The northern region is not an important pineapple producing area, primarily because of its small area, low percentage of planted area, and low yield per unit area. Pineapple growing is rather a subsidiary business here.<br> The midwestern region has become the nucleus of pineapple cultivation in Taiwan. Even by admini-strative units, pineapple growing area is extensive with a large percentage of planted area, and a fairly good yield is obtained. As for raw materials for processing and fresh fruits, this is the primary center in Taiwan.<br> The southwestern region is somewhat similar to the midwestern region in various respects. The most significant characteristic of this region, however, is the highest yield per unit area. The southeastern region also is similar to both midwestern and southwesternregions, but its striking significance is its largest cultivated area per farmer, together with the fact that the area has only recently been formed. <br> A general consideration on this regional differentiation explains that climate has played and is playing a decisive role in the selection of pineapple regions, in that the temperature in the northern region, especially in winter, is unsuitable for pineapple growing. The other three regions are well favored with suitable temperatures for the growing of pineapple i n general.<br> On the hills facing the western plains of Taiwan, two of the most prospering pineapple regions exist today. Although climate there is suitable for pineapple growing as mentioned above, economic conditions cannot be neglected; that is, transportation of the two regions is convenient and many pineapple canners are located there. The encouragement policy rendered by the authorities also has played an important role in fostering these two regions as the nuclei of pineapple growing areas.<br> In the southeastern region, pineapple industry has been developed largely by the Taitung Sugar Factory of the Taiwan Sugar Corporation (_??_) for the development of eastern Taiwan on which the Taiwan Provincial Government has been working. The Taitung Sugar Factory also needed multiple management, so it established a modern cannery there.