This experiment was carried out to investigate the influence of rhizome size and planting space on some agronomic characters and rhizome yield of ginger in greenhouse cultivation. The average air temperature was 9$^{circ}C$ higher in greenhouse cultivation than in field. The average soil temperature also was 2-4$^{circ}C$ higher in greenhouse. Plant height, leaf area, stem number and rhizome yield were significantly increased when cultivated at greenhouse compared to field. Under greenhouse the yield of rhizome in 30$ imes$30cm planting space were appeared to be increase 121-183% compared with field cultivation. At the planting space of 60$ imes$30cm, harvests were increased 76-82% comparing field cultivation. The most suitable rhizome size for planting at 30$ imes$30cm planting space found to be 40g in greenhouse cultivation.