The purpose of this study were: (a) to identify teaching concerns of preservice P.E teachers in National College of Physical Education and Sport; and (b) compare the differences of different demographic variables on teaching concerns. The questionnaire including: (a) demographic information sheet; (b) Teaching Concerns of Preservice P.E Teacher Scale. The sample were 215 preservice teachers selected from National College of Physical Education and Sport. Descriptive statistics, independent sample T-test, One Way ANOVA, and Scheffe method were used. The results of this research were as the followings: 1. Teaching concerns of in rank order were self concern, impact concern and task concern. 2. Preservice teachers of married were more self concern than those of unmarried. 3. Preservice teachers more than of 31 years old were more self concerns than teachers of less than 25.