Potato is the most important vegetable in Ethiopia for cash and plays important role in food security.It is short duration vegetable and highly productive as compared to other cereals. However its productivity in the country is very low as compared to the worlds. The main factors contributing this low yield includes lack of improved varieties,poor agronomic practices, diseases and insect pests,poor post harvest management activities and poor quality seed tubers used by farmers in the country. The main quality parameters for potato seed tubers are temperature and storage duration that affect the physiological age of the tuber during production. Therefore, this book contains important information for potato seed producers in the country about seed potato storage duration and factors affecting the quality of the tubers used as a seed.