It is inevitable to employ part-time, probation, and substitute teachers for the convenience of the administrative practice in the elementary and middle schools. However, in response to low birth rate, schools and their competent authority-in-charge have the measures of total amount control of teachers. As a result, some permanent positions were turned into temporary ones. Another factor for the need of adjunct faculty came from the policy of reducing course loads after elementary and junior high school teachers were required to file their taxes. As teachers play a crucial role in educating the young generation, it is necessary to establish reasonable working conditions to protect their rights, which may also help attract excellent intellectuals and promote the regular operations of schools and quality of teaching. However, as far as the current situation is concerned, Labor Union Act, Collective Agreement Act, Act for Settlement of Labor-Management Disputes apply to adjunct faculty hired by each school, and social security is acceptable. Yet, when Teacher’s Act and Labor Standards Act do not apply to them in the long term, their labor rights cannot be protected appropriately, which in turns, may have a negative impact on both the long-term development of education and students’ education rights. Therefore, this study will conduct a legal analysis of current laws in education and labor to confirm the legal regulations and reasonable employment contracts that apply to adjunct faculty in the elementary and middle schools. It will also provide related suggestions for current hiring systems to balance the rights of education administrative institutes, schools, adjunct faculty and students.