Perceived social support and organizational trust have gained importance in organizational life along with the human relationship among organizations. While social support concept has been accepted as the support obtained from individual's surroundings, organizational trust is defined as the result of consistent behaviors based on mutual respect and courtesy, and it considers members' benefit and is usually gained gradually. First aim of this study was to define the level of primary school teachers' perceived social support and organizational trust, and the second aim was to exhibit the relationship between perceived social support and organizational trust. This study was designed with correlational survey method and quantitative data collection methods were used. The sample of the study was consisted of 151 volunteer primary school teachers in 10 different primary schools in Kars city center. Data were gathered through the Organizational Trust and Teacher Professional Social Support scales. Results of the study indicated that there exists a medium level positive correlation between primary school teachers' perceived social support and organizational trust. There is also a medium level positive correlation between administrative support and trust towards school principal, and between the level of colleague support and trust towards colleagues.