Study of students' physical & mental health status, and emotional quotients (EQs) regarding selected factors is very crucial for developing their good health. The purposes of this research were to study the relationships among physical & mental health status, and students' EQs, and to search for which variables would be able to predict their EQs. The population was students of the Thai elementary school ranging from the first grade to the ninth grade. Four hundreds and fifty subjects were selected by stratified random sampling, quota sampling, and simple random sampling with power analysis of .95 and effect size of .17 at p < .05 level. Instrument was a physical health status questionnaire, an EQ test, and the standardized HOS. Data were collected over a month period analyzed by using mean, standard deviation, t-test, ANOVA, Pearson correlation, and stepwise multiple linear regression. Major findings included the following: 1. Students' physical health status and EQs were average, whereas students' mental health status were good. 2. There were statistically significant differences at p < .05 level between mean scores of students' physical & mental health status, and emotional quotients which were different in mother occupation, taking care models, mother education, and family incomes respectively. 3. There was a positive correlation statistically significance at p < .05 level between students' physical and mental health status. However, negative correlations statistically significance at p < .05 and .01 level were shown between students' physical health status and their EQs, as well as students' mental health status and their EQs. Out of the hypothesized predicting variables, students' physical and mental health status predicted significant variances in their EQs. This study provides a greater understanding that students' physical and mental health status influence students' EQs. However, further research, more large-scaled and randomized study, is recommended for generalizability.