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Through the use of projective tests, this text attemps to establish a relationship between the representation of self of the psychotic adolescent and the expression of psychic temporality. After having evoked the difficulty of a diagnosis during adolescence with several specialists, as well as the notion of temporality during adolescence, the author reviews the principal studies on the subject of temporality in projective tests. Then, she proposes a reading of the tests according to two principal indicators: associative continuity in as far as it participates in the libidinal cathexis of psychic time and the differentiation of the plates, as an indicator of the acceptance of a change of stimuli, and so doing, of any process of change. The case study of a nineteen-year-old adolescent girl in the first stages of psychosis will serve to illustrate our proposition.