The protected cultivation technology can be utilized for the year round production of high value quality vegetable crops, with high yield. By protected cultivation, high water and nutrient use efficiencies can be achieved. Increasing photosynthetic efficiency and reduction in transpiratory. losses are added advantages of protected cultivation. Both these are of vital role for healthy and luxuriant growth of crop plant. This technology is highly suitable for farmers in periurban areas of the country. But protected cultivation requires careful planning and attention including selection of crops, varieties, suitable production technology like spacing, time of planting, water and nutrient management and plant protection to produce economic yield of better quality. Considering all these aspects, we hope this book will be help full as base of production technology for cucumber (Cucumis sativus L.) under protected cultivation.