Introduction. Mango conservation under traditional refrigeration systems is not totally efficient due to the susceptibility of this fruit to chilling injury, but controlled atmosphere (CA) in association with low temperature can improve its storability and maintain fruit quality during storage. Thus, the aim of our study was to determine the effect of CA with varied concentrations of oxygen during cold storage (12.8 ° C) of ‘Palmer’ mango fruit. Materials and methods. Mature green mango fruit were stored in atmospheres with (1%, 5%, 10%, 15% and 21%) oxygen at (12.8 ± 0.6) °C and RH ~95%) for up to 28 days. A group of fruits without CA was stored in a cold room and served as tray-stored control. Fruit ripening was carried out in ambient conditions [(25.2 ± 0.6) °C, (92.8 ± 2.4)% RH)] at intervals of 14 d. Results and discussion. Fruits stored in low-oxygen concentrations [(1%, 5% and 10%) O2] had significantly lower rates of CO2 production after 14 d of cold storage. Fruit from all treatments were considered immature after 28 d of cold storage, and the mangoes kept at (1%, 5% and 10%) O2 maintained their initial firmness (119.9–125.6 N) when compared with those stored in higher oxygen atmospheres, which underwent a substantial loss of firmness (96.8–109.1 N). At low-oxygen levels, fruit also had lower contents of soluble pectin and total soluble sugars, whereas colour parameters were not affected by the atmospheres. After transfer from CA containers to ambient conditions, even from the lowest oxygen concentrations [(1% and 5%) O2], fruit ripened normally in just 8 d without presenting any low oxygen-related injury.