This study is performed in two stages along with about one to two-month period to assess the validity and reliability of the Persian translated version of the Occupational Impact of Sleep Questionnaire (OISQ). The Persian version of the Pittsburg Sleep Questionnaire Index (PSQI-P) as a valid and reliable scientific tool to differentiate cases and controls. From 150 people - all had official works - eventually, 121 persons (81 female and 40 male) were eligible for participation. The α-Cronbach’s validity coefficient of translated OISQ was 0.786 at the level of 1% (p<0.001). The α-Cronbach’s correlation coefficients for reliability were 0.972 and 0.976 in stage one and two, respectively. It was found that scoring ≤12 and ≥20 from OISQ-P were compatible with good sleeper and poor sleeper, respectively.