The home quarantine period caused by the Covid-19 pandemic can affect children's perceived motor ability. The purpose of the present study was to investigate the effect of physical maturity levels and the type of positive or negative attitudes of parents to play in green space on perceived motor competence during home quarantine. This research was a cross-sectional observational study, three hundred female participants by the mean age of 9 to 11 in the academic year of 2020-2021. The data of the present study are in the form of an online survey including 3 sections on demographic characteristics, competence, motor skills, perception and parents' attitudes toward playing in green space , was collected. To determine the status of physical maturity, the method of estimating the percentage of adulthood obtained at a certain age (Khamis-Roche 1994 method) was used. According to the analysis of variance, the main effect of physical maturity and the main effect of parents' attitude toward outdoor playing on mobility skills, object-control and perceived motor competence is significant (p <0.05). Children with normal and premature maturity levels and those children whose parents' attitudes toward outdoor playing were positive in compared to delay children and those children whose parents had a negative attitude towards outdoor playing, had showed a better movement skills, object control and perceptual motor competence. As a result, outdoor playing and playing in nature are recommended for children with different levels of maturity to develop basic motor skills during and after home quarantine.