The psychological concept of belonging (or belongingness) is a strong motive found in human nature. When not satisfied or is lost, it causes highly problematic behaviors and relationships, leading sufferers to try to satisfy their need to belong. This article studies how belongingness finds reflections in the isolated and traumatized soldier characters of the two significant plays, namely Penetrator (1993) by Anthony Neilson and Blasted (1995) by Sarah Kane, of the 1990s British drama, known also as the In-Yer-Face theatre. In order to achieve this, this article analyzes the soldier characters – Tadge from Penetrator and Soldier from Blasted – found in these plays by means of the theories and related studies on the concept of belonging such as those put forth by Roy Baumeister, Mark Leary, Abraham Maslow, Sigmund Freud, and Jacques Lacan. The study expands the analyses on the soldier characters of the plays by juxtaposing the theories on belonging and sense of belonging with the related studies on several other psychological concepts such as recognition, post-traumatic stress disorder (PTSD), and transference.