Titratable acidity, and pulp, sugar, ascorbic acid, β-carotene and total phenolic contents were evaluated in fruits of wild cactus pear (O. ficus-indica) sampled from major wholesale markets Sana'a and Taiz cities in Yemen during the summer of 2000. Mean values of pulp yields and chemical components did not significantly vary among fruit samples obtained from wholesale markets in both cities. The pulp yields of fruits obtained from wholesale markets were approximately 62%. The total and reducing sugar contents were approximately 9 and 8%, respectively. Ascorbic acid and β-carotene were present in moderate levels (14.70 mg/100 g and 334.00 µg/100 g, respectively), but the fruits had total phenolic contents.