Abstract: The study was conducted to investigate the effects of different storage conditions on seed viability of mush bean, variety Mash-3. Three factors were included period and seed moisture content. Viability and Moisture content were determined in control which were 91.0 and 8.0 percent respectively. The maximum germination percentage was observed in seeds with low moisture content. There was a decline in germination percentage after 90 days of storage at all temperatures in seeds with high and medium moisture contents. High moisture content and high temperature decreases germinability of seeds. The storage life of mashbean can be increased by lowering temperature and seed moisture content during storage.