This study investigated the mere proximity effect of obesity discrimination in children in Chinese culture. One hundred and thirty children between 9 and 14 years old were asked to indicate how much they would like or to be friends with a target character, who was either male or female and average-weight or overweight. The target character was presented with four other background characters of the same gender, whom were either average-weight or overweight. The findings demonstrated that female targets were preferred less when presented with overweight background characters than when presented with average-weight background characters. However, male targets were preferred more when presented with overweight background characters than when presented with average-weight background characters. The findings indicated an anti-fat mere proximity effect in female children but a contrary effect in male children in Chinese culture. These findings may have implications for a better understanding of weight bias from a cultural perspective.