This thesis explores phubbing (snubbing someone in the middle of a face-to-face conversation by using smartphones instead of paying attention) in friendships. Specifically, it examines which individual factors (personality and psychological factors) drive friend phubbing and if friend phubbing leads to lower levels of friendship satisfaction. Also, this thesis investigates the mediating role of friend phubbing between proposed predictors and friendship satisfaction. Participants (n = 472) showed that depression and social anxiety were positively related to friend phubbing while agreeableness and neuroticism were negatively related to friend phubbing. Higher levels of friend phubbing resulted in decreased friendship satisfaction. The results showed that friend phubbing mediates the relationships between each of the proposed predictors (i.e., depression, social anxiety, agreeableness, and neuroticism) and friendship satisfaction. This thesis is the first to examine the dynamics of phubbing in friendships from a communication perspective.