The family Tettigoniidae is associated with grassland damage in several countries, but there are few reports of tettigoniids causing damage to other crops. Specimens of katydids were found damaging banana fruits in Brazil. A survey of their occurrence was conducted, and the damage to banana fruits was quantified. Specimens were identified as Meroncidius intermedius Brunner Von Wattenwyl (Orthoptera: Tettigoniidae). This is the first report of damage caused by this species to an economic crop, and to banana. Symptoms and frequency of damage to banana crops, and behavior of M. intermedius, are discussed.