Given the high prevalence of adolescent gambling involvement and disorder, this study adapted the revised version of the Inventory of Gambling Motives, Attitudes and Behaviors to an adolescent version (GMAB-A) with a cross-sectional survey of 809 Chinese high school students (41.6 % females, M = 16.86, SD = 1.36) in Macao, China. Confirmatory factor analyses generally supported the original factor structure. The GMAB-A consisted of six, four, and four factors in the motivational, attitudinal, and behavioral domains respectively after refinement. The factor scores were correlated with the criterion variables such as disordered gambling symptoms in the expected directions, and their reliabilities were satisfying. Our findings also suggest that the attitudinal subscales are applicable to non-gamblers. In addition to its application on research, the GMAB-A can be used as an enquiring tool for gambling cognitions and behaviors and thus facilitate devising intervention programs for adolescent gambling disorder.