The present study aims to evaluate and refine the Inventory of Gambling Motives, Attitudes and Behaviours (GMAB) specifically designed to assess gambling-related cognitions and behaviours of Chinese gamblers with a random sample of 697 Chinese adults in Macao who were interviewed by telephone. Confirmatory factor analysis generally replicated the basic factor structure of the three domains of GMAB although the removal of several items with low factor loading or cross-loading was suggested. Moreover, the findings supported the addition of another motivational subscale, socialization. The revised version has six subscales of motives (self-worth, monetary gains, sensation seeking, boredom alleviation, learning and socialization), four of attitudes (fate and luck, negative consequences of gambling, techniques and superstition), and five of behaviours (impaired control, gambling involvement, arousal reaction, superstitious behaviour and controlled gambling). The psychometric properties of the revised GMAB (GMAB-R) were demonstrated to be satisfactory.