Jujube is a common fruit in Chinese diet, jujube pit is sharp but has rarely been reported to cause digestive tract perforation. Here we presented a rare case of sigmoid colon perforation by a jujube pit in an 88 year-old toothless woman. The evidence of peritoneal irritation was acquired by physical examination and CT scan. Then perforation peritonitis was diagnosed, and emergency operation was performed accordingly. The patient recovered smoothly and was discharged after 10 days of hospital stay.