Objective: Poor sleep hygiene practices can interfere with sleep and may be a contributing factor for insomnia. Only few instruments have been developed to assess sleep hygiene practices. Most of them had only fair internal consistency, limited construct validity, and/or were tested only in non-clinical population. The aim of the study was to evaluate the psychometric properties of the Sleep Hygiene Practice Scale (SHPS) that we developed for the measurement of poor sleep hygiene practices.Method: A total of 89 normal sleepers and 106 insomniacs participated in the study. SHPS, Chinese Pittsburgh Sleep Quality Index (CPSQI) and Insomnia Severity Index (ISI) were administered.Result: The finding showed that normal sleepers and insomniacs showed similar factor structure in the SHPS. The SHPS contained four factors: (1) sleep schedule and timing, (2) arousal-related behaviors, (3) poor eating/drinking habits prior to sleep, and (4) poor sleep environment. Internal consistency and Goodness of Fit indexes were acceptable. The SHPS demonstrated good criterion-related validity for all factors in related to measures of sleep quality in normal sleepers; however "arousal-related behaviors" was the only factor that was correlated with sleep quality in insomniacs. Finally, the result showed "arousal-related behaviors" could differentiate insomniacs from normal sleepers.Conclusion: The SHPS contained four factors. The psychometric properties of the SHPS were found to be superior to previously published sleep hygiene instruments. It can be a useful measure to be applied for both research and clinical purposes.