This study tried to compare and analyze the thermal comfort index according to GVZ of school green space. For the analysis, this study performed a correlation analysis with weather elements by measuring and calculating UTCI, PMV, and WBGT according to GVZ. GVZ was in the order of Type 3 (5.68 m3/m2) > Type 2 (4.71 m3/m2) > Type 1 (3.37 m3/m2). The average temperature and solar radiation, surface temperature, globe temperature among weather characteristics was in the order of Type 1> Type 2 > Type 3. The UTCI in the school green space was in the order of Type 1 (33.95°C) > Type 2 (33.68°C) > Type 3 (32.73°C). At Type 3 that the GVZ is higher than other Types, it is belongs to range of 26~33°C which gets normal heat stress, and other Types belong to range of 33~38°C which gets strong heat stress. The PMV was in the order of Type 1 > Type 2 > Type 3, and the estimated rate of unsatisfaction was appeared as 100%, so it is uncomfortable even in the school green space that it requires measure on heat wave. The WBGT was in the order of Type 1 > Type 2 > Type 3. The result of the correlation analysis according to the heat comfort index shows that, the higher the green ratio and GVZ are, the UTCI has negative relationship, and PMV and WBGT were analyzed as have no relationship according to green characteristics, but this result was considered as measured at green space when the temperature was at its highest so the uncomfortable feeling was also highest. The result of correlation analysis of green characteristics and the weather elements shows that GVZ and insolation, temperature has negative relationship, so it is considered that the higher the GVZ is, the solar radiation and the temperature are decreased.