Sensitivity analysis is presented in an inventory model of deteriorating items involving fuzzy with shortages and infinite production rate. It is observed that the time of one cycle highly decreased by increasing holding cost, purchasing cost, shotage cost and hazardous rate; the inventory period highly decreased by increasing the holding cost, purchasing cost and hazardous rate but highly increased by increasing the shotage cost; the average total cost per unit time highly increased by increasing the holding cost, purchasing cost, shotage cost and hazardous rate.