The purpose of this study is to suggest the construct model of teaching competency in teacher librarian. For this purpose, this study compares and analysis the existing literature of which teaching competency of subject teacher and teacher librarian competency standard. The teaching competency model of teacher librarian was designed with the result of compares and analysis. The suggested model composed of 3 process: ① instructional design, ② instruction implementation, ③ instruction evaluation. It is also suggested that construct of isolated instruction and cooperative instruction. This study can be helpful to development a in-service program of teacher librarian and curriculum of Teacher librarian education.