"The purpose of the study was to provide an useful information that is expected to be helpful in policy-making process for the future constructions of school play-grounds and gymnasiums. For this, the investigators closely explored students' experiences and thoughts, regarding the use of school play-ground and gymnasium, who had been student-teacher in physical education major. In the study, total eight senior students, who enrolled in an educational University in Gyonggi province in 2010 and have four-year-experience of student-teacher practices, are selected as research participants by Goetz & Lecompte's (1984) criterion-based sampling method. Semi-structured and open-ended in-depth interviews were conducted at a quiet place. Each interview took for 40 to 60 minutes, and was recorded upon the participants' agreement. The recorded data were transcribed and were analyzed by Hatch's(2002) nine-step inductive analysis method. The research findings are as follow; First, as positive educational function, school play-ground functions as 1) a non-restricted area and 2) an emotion-developing place. Second, limitations in using school play-ground are 1) small-size-nature of play-ground and 2) inevitable influences under weather condition. Third, as positive educational function, gymnasium provides 1) independency from weather condition, 2) a better concentration in classes, and 3) a better environment for instructing indoor sports. Fourth, as problems in using gymnasium, 1) limited access for students and 2) faculty member-centered operation are found. In addition, students in the study have overall negative opinion about construction of gymnasium at the cost of school play-ground. ※ Key words : School play-ground, gymnasium, student-teacher, elementary school policy"