Endometriosis is defined as the presence of a functioning endometrium outside the uterus. Abdominal wall endometriosis is a rare entity. Most of the abdominal wall endometriosis occurs in or around surgical scars following caesarean section or hysterectomy. We report a case of scar endometriosis following caesarean section and diagnosed by fine needle aspiration cytology (FNAC). Excision biopsy confirmed the FNAC diagnosis of scar endometriosis.