Abstract: This study aims to explore and identify the critical factors that influences wechat users stickiness of Wechat group chatting, the most popular platform of network community in China. An online questionnaire survey was conducted during March, 23 through 26 with 124 respondents. The respondents consist of 54 male and 74 female, over 80% are between 26~40 years old, over 80% holds undergraduate degree and over 50% Wechat users have 6-10 different group chatting communities. The collected data were analyzed with Smart PLS 2.0 to test the internal consistency, convergent validity and discriminant validity. Over 90% of the respondents actively attend group chatting activity. Wechat group chatting as a representative mobile virtual community service has attracted great amount of users while there is little research on the user’s behaviors in the context of group chatting community. Information accessibility, perceived information dissemination efficiency, perceived playfulness, fulfillment of needs were selected as independent variables and user accessibility and organizational commitment were selected as mediation variable and dependent variable respectively. The positive relationship between information accessibility and user stickiness suggest that Wechat group chatting community has become an important information resource which has significant meaning to understand people’s information behaviors in today’s mobile internet era. The positive effect of perceived information dissemination efficiency on user stickiness indicates individual’s information sharing behaviors that is in consensus with perspectives of efficiency related theories. Perceived playfulness was also found to have significant effects on user stickiness and this is in consensus with previous research on playfulness under the context of internet. User stickiness was also found to be significant in affecting organizational commitment as previous research have indicated. Fulfillment of needs was insignificantly related with user stickiness as which suggests that community members might have different level of needs from the communities due to the differences of organizations. This research has great values for both academic research and businesses considering the role of mobile SNS play today. The businesses need to have deep insight into the consumers behaviors on mobile SNS.