Rooted in scholarship of social connectedness and social support, this research raises the question: Can online chatting help mitigate the negative psychological influence of physical distancing during COVID-19? By a correlational and cross-sectional research design, the current study testified the mediating role of two factors--social connectedness and perceived social support in the relationship between online chatting and three indicators of psychological well-being (happiness, self-esteem, and loneliness) for adolescents. This research demonstrated the potential of online chatting in mitigating the severity of quarantine from the supplementary perspective of online communication effects on adolescents, which provided a further insight into understanding the ways in which adolescents use media during school closure. Possible contingent factors that should be paid special attention to in future researches are discussed.