There is a severe lack of instruments assessing problem gambling in Chinese people. This chapter examined the psychometric properties of the Chinese version of the Maroondah Assessment Profile for Problem Gambling (Chinese G-MAP) based on the responses of eight problem gamblers and 125 pathological gamblers seeking help from a problem gambling treatment centre. Reliability analyses showed that the G-MAP and its related domains and scales were generally internally consistent. There are also several lines of evidence suggesting that the Chinese G-MAP and the various domains are valid: a) the various G-MAP domain and scale measures were significantly correlated among themselves; b) the G-MAP measures were significantly correlated with pathological gambling behavior assessed by the DSM-IV; c) the G-MAP total scale and domain measures were able to discriminate problem gamblers and pathological gamblers. The present study suggests that the Chinese G-MAP possesses acceptable psychometric properties that can be used in research and practice settings.