Caecal diverticulum perforation is a rare condition. It mimics acute appendicitis and is seldom suspected pre-operatively. Commonly it is discovered during exploration. Ultrasonography and computed tomography are helpful in the diagnosis of the condition. There is controversy regarding the surgical treatment. We are presenting the case of a 44-year male who underwent exploration for suspected acute appendicitis but was found to have a perforated solitary caecal diverticulum. Patient underwent diverticulectomy and made an uneventful recovery.