Freud's classification of resistance according to place of origin in the psychic structure is applied to the phenomena of resistance in group therapy. The varied forms of resistance are depicted. Special emphasis is given to group-destructive resistances, those that threaten the therapeutic viability of the group or the treatment of any of its members. The often covert relationship of the resistances of the individual to those of the group as a whole is examined. The group's tolerance of a member's uncooperative or deviant behavior is seen as prime evidence of the presence of group resistance. The therapeutic validity of a group-oriented approach to resistance is clinically illustrated.