Educational research skill which is considered as a component of professional development competence of Vietnamese teachers, is an indicator of the Vietnamese teacher professional competences standards approved by the Ministry of Education and Training. Many activities have been organizing to enhance the teacher research skills in Vietnamese schools. The article deals with the possibilities of the incorporation of action research – a form of educational research – into teacher professional development; shows a relative status of Vietnamese teachers’ competence on action research; and thus, proposes some orientations on promoting teacher professional development through developing action research skills in Vietnamese schools.