Abstract: The paper reported a case of tubal ectopic pregnancy in cats, which is rare in veterinary clinic, and has not reported in cats. A 2-year-old British shorthair cat palpated a substantial hard object in the abdomen. No other abnormalities in clinical examination. X-rays showed an oval-shaped mass with a clear edge in the abdominal cavity. The cat was subjected to exploratory laparotomy and ovariohysterectomy, histopathological examination was performed on the removed tissue. Resultant diagnosis was tubal ectopic pregnancy, the gestational sac was found in the fallopian tube with hyaline degeneration of the cyst wall. Oviduct wall, pregnant sac wall and fetal tissue were calcified. The endometrium showed Arias-Stell reaction. No recurrence was noted in our patient after one year of follow-up. Ectopic tubal pregnancy in cats is rare in clinic, which has certain reference value and significance for clinical diagnosis and treatment of related diseases.