When flower thrips Frankliniella intonsa (Trybom) increased in February and April 2009 in a bell pepper greenhouse on Okinawa Island, southwestern Japan, we found a marked injury to the fruit skin that has not been reported to date. The characteristics of the fruit damage are described and illustrated. A large number of larvae of F. intonsa were observed in the damaged portions. The same damage was induced when larvae or adults were inoculated into the surface of bell pepper fruit under laboratory conditions. These results indicate that F. intonsa caused the injury. We must remain alert to possible expansion of this injury.