It is observed that mask addiction which is one of process addiction has been increasing recently. This paper begins with the concept of the addiction and the description of process addiction. Then, Social Anxiety Disorder (SAD) which is the fear of social situations that involve interaction with other people is introduced. The patient of SAD tends to fall into mask addiction because he/she can hide their anxiety by covering their faces with masks. This paper presents the cases and recovery processes of mask addiction, and also refers to participation to community for recovery from addictions.