This study predicted the demand for new elementary school teacher recruitment due to the decrease in the number of elementary school students in the future using the estimated data of the elementary school age population announced by the National Statistical Office in December 2021. In elementary education, the number of teachers required to reach the OECD average level(14.5 student teacher ratio) and Finland(13.5), which is the highest level among major countries, is used for the prediction criteria. As a result of the estimation, an average of 678 to 2,638 new teachers seems appropriate to reach the Finnish level. If reaching the OECD average level is set as the standard, between 297 and 2,150 teachers are expected to be newly hired every year. However, in a situation where the decrease in the number of elementary school students is very rapid, in an estimate focusing on financial efficiency, there is no need to hire new elementary school teachers until the mid to late 2030s. According to the low-level estimate, it is analyzed that only 2,700 new hires per year are required for three years from 2038 to 2040. If the current number of elementary school teachers is taken into account, the number of students per teacher will reach the OECD average without hiring a new elementary school teacher by 2027. Therefore, it seems that it is time to review the reform of the elementary school teacher training system seriously.