This study was undertaken to assess levels of job stress, self-efficacy, job satisfaction, and job involvement as perceived by school dietitians/nutrition teachers during the early stage of the COVID-19 pandemic and to determine the effects of these three factors. An online survey was sent from May 18 to May 26, 2021, to school dietitians/nutrition teachers in Seoul with experience of foodservice operations during 2020; 250 responses were used for this analysis. Job demands contributed most to job stress, whereas human relations contributed most to job satisfaction. Job stress caused by COVID-19 had a negative impact on self-efficacy (P＜0.01) and job satisfaction (P＜0.01), but a positive impact on job involvement (P＜0.05). Self-efficacy positively impacted job involvement (P＜0.01) but did not significantly influence job satisfaction. However, job satisfaction during early COVID-19 positively impacted job involvement (P＜0.05). In conclusion, job stress associated with job requirements was greater during the early stage of the COVID-19 pandemic than before the pandemic guidelines are needed that enable school dietitians/nutrition teachers to better cope with the job pressures generated by infectious diseases.