A fishing gear maintenance cost estimation system uses a fishing gear maintenance cost estimation program to estimate cost of maintenance of fishing gear. The fishing gear maintenance cost estimation system has an information acceptance component, a replacement part determination component, a cost computation component and a display. The information acceptance component accepts estimation basis information including product information and condition information. The product information is information for identifying a product name of fishing gear. The condition information is information for identifying condition of the fishing gear. The replacement part determination component determines a part which must be replaced on the basis of the estimation basis information. The cost computation component computes the overhaul cost including the cost of the part. The display displays the overhaul cost.