“Fantasies, myths and dreams as witnesses of family psychic groupality”. The author presents how fantasies, myths and dreams are psychic formations which belong to the individual unconscious as well as to the family psychic groupality, particularly because of their universality and reference to origins. They work as family organisers, which circulate through the family links, and indicate the nature, strength and development of the latter. Rended specific by the mutual changes they induce within the unconscious of two or more individuals, including babies, the links show various modes of intersubjective functionning. The concept of intersubjectivity is relatively recent in psychoanalysis and appears to be of value to enlighten the family psychic groupality. Some clinical examples are given from psychoanalytic family therapies, in order to illustrate how the group resonance of fantasies, myths and dreams allows them to be put in common and shared, so that they help to build the family self and its psychic envelopes. Thanks to transference and counter-transference movements, the family psychic group gains enrichment of its metaphoric, mythopoietic and creative skills while playing with these psychic formations.