In this research, to what extent the variables of perceived social support (family, friends and special people) and assertiveness predicted the psychological well-being levels of candidate psychological counselors. The research group of this study included totally randomly selected 308 candidate psychological counselors including 174 females (56.5%) and 134 males (43.5%) studying at Erzincan University, Faculty of Education, Psychological Counseling and Guidance Department in 2015-2016 academic year. The age average of the research group was 20.84. Psychological Well-Being Scale, Voltan-Acar Assertiveness Scale, Multidimensional Perceived Social Support Scale, and Personal Information Form were used as the data collection tools in the research. The data obtained in the research were analyzed with stepwise regression analysis method as one of the multiple linear regression analyses methods. According to the research findings, the variables of assertiveness and social support perceived from family, friends and special people significantly predicted psychological well-being.