An incisional herniaIncisional hernia after an abdominal operation develops in approximately 10% of the cases. However, incarceration of an incisional hernia is relatively low. On the other hand presence of an inflamed appendix, in one hernia sac is a rare entity which may cause mis or delayed diagnosis. This case is an example of acute appendicitis which is atypically located in an incisional hernia sac and mimick incarceration.