Demand of achievement of various life purposes drives people to make efforts under time limitation. Therefore time allocation of a week is basic and crucial for people. Normally, weekdays are almost occupied by many essential activities, such as work, diet and sleep. People will make use of weekends to interact with other family members and to achieve other life aspirations. Therefore, this study proposes that time allocation of weekdays and weekends are related. Following previous hypothesis, the structure of time allocation between weekdays and weekends will be modeled by using structure equation model. By using ìActivity Diaryî, individualsí time use data and evaluation of time of each activity on weekdays and weekends will be collected. Consequently, impact of factors on time allocation will be clarified.