This is an ex-post facto design study used; to determine teachers’ personality on school phobia among primary school pupils in Bayelsa State, Nigeria. . Two research questions and three hypotheses guided this study The population of the study consisted of 2971 primary six school pupils and 537 primary school teachers in Bayelsa State. A sample of 749 pupils and 81 teachers participated in the study. Proportionate sampling, purposive and simple random sampling techniques were used to draw the sample size. Two instruments titled: Teacher Personality Traits Scale (TPTS) and Pupils School Phobia Questionnaire (PSPQ)) were used for data collection. The reliability indices of the instruments were established using Cronbach Alpha with coefficients of 0.83 for TPTS and test retest coefficient of 0.86 for PSPS respectively. Mean (x) and Standard Deviation (SD), while One-Way Analysis of variance (ANOVA) and Two Way Analysis of Variance (ANOVA) were used to test the null hypotheses at 0.05 alpha level. Results got revealed that the highest school phobia was experienced by pupils of teachers with personality traits of extraversion.. Based on the findings, it was recommended among others that employers of teachers should ensure adequacy of this personality characteristics in their would be teachers before they are employed.