The purpose of this study was to categorize adult's subjectivity of their attitudes towards life sustaining treatment, and thereby understand the differences among these life sustaining treatment types using Q methodology.Q-methodology, which provides a method of analyzing the subjectivity of each item, was used. Thirty selected Q-statements received from 52 adults were classified into a shape of normal distribution using a 7 point scale. The collected data was analyzed using a QUANL pc program.Four types of attitudes toward life sustaining treatment were identified. Type I is called one's autonomy type. Type II is called potentiality of resuscitation type. Type III is called DNR (Do not resuscitation) type. Type IV is calledone's effort type.The results of the study indicate that different approaches of life support care programs are recommended based on the four types of life sustaining treatment attitudes among Korean adults.