With the growth of the Internet, it has increasingly become a tool for cyberbullying among youth.  Many previous studies have found that most victims of cyberbullying do not consult anyone about the bullying.  The present study examined the process that results in victims of cyberbullying not consulting others.  The hypothesis was that cognition of cyberbullying threats results in increased helplessness which, in turn, suppresses the victims’ behavior of consulting friends and family.  In a preliminary survey of 8,171 high school and undergraduate students, 283 (3.5%) reported that they had been victims of cyberbullying.  In the subsequent main survey, victims of cyberbullying (217 of the 283 identified victims: 85 men, 132 women ; average age 19.69 years) completed a questionnaire that measured their experience of cyberbullying, cognition of threat, helplessness, and consulting behavior.  Factor analysis of the scores for cognition of threat resulted in the extraction of 3 factors: isolation, inescapability, and information-diffusion.  Covariance structure analysis indicated that cognition of threat promoted by the experience of cyberbullying suppressed consulting behavior.  These results supported the research hypothesis.  Interventions that reduce the cognition of threat may be effective in the prompt resolution of psychological problems caused by cyberbullying.