Objectives : The aim of this study is to validate the correlation between Pain Face Scale(PFS) and Numerical Rating Scale(NRS), and to find out the methods to assess headache by PFS. Methods : The study participants included 28 headache patients. All patients answered questionnair, which include PFS, NRS, and other questions for measurements headache. It is analyzed by frequency, correlation with spss windows 14.0. Results : 1. PFS include the strength of headache, and feelings. 2. PFS express strength of headache more than NRS. 3. There was no significant relationship between aspect and regions of headache. Conclusions : Therefore PFS is objective measurement scale of headache.