Gestalt therapy is an experiential, evidence‐based approach originally developed by Frederick Perls (1893–1970), Laura Perls (1905–90), and Paul Goodman (1911–72) as a revision of psychoanalysis. The multifaceted options available to a gestalt therapist cluster around the four main tenets of its theory, unified in a process of contacting within the therapist–client field. Contact is defined as meetings of various kinds between self and other in which the therapist can follow the emerging experience of the client, engage the client in dialogue, purposefully address some aspect of the client's field, and/or negotiate an experiment. It is at once experiential and experimental, dialogical, field oriented, and phenomenological. The general theory of change is paradoxical—people become what they might be by being what they are. This entry explains gestalt therapy in terms of its originators, philosophical base, view of persons, view of pathology, approach to psychotherapy, and evidence base.