This article attempts to analyse the rational or understandable factors in suicidal behaviors from psychodynamic perspective based on real cases. Suicide itself is utilized by subject consciously or unconsciously as an expressive instrument among the college students group to flee away from unbearable pain, to maintain the relationships with inner self-objects, or to represent aggression and revenge to prime objects. Suicide is not an irrational impulsion, but a limited option which is made by the dysfunctional self in a hopeless situation.