In Korea, about 1,500 teachers were dismissed in 1989. The main reason for dismissal was that they refused to withdraw from Korean Teachers and Education Workers' Union (KTU, Jeongyojo), an illegal organization. Most of them were reinstated in 1994 after four years and six months. The purpose of this study was to analyze the experiences of the dismissed teachers in the process of dismissal and reinstatement. In particular, I analyzed dismissed teacher’s memory on the dismissal event. Qualitative interview with 9 dismissed teachers was conducted. The results were as follows. First, the dismissed teachers constructed a critical teacher’s identity through participation of teachers movement. Their identities were affected by organization’s identity. Second, the dismissal event was remembered and interpreted differently by the two groups of KTU, the political-struggle group and the educational-reform group. Finally, the dismissed teachers suffered from cultural trauma stigmatized as communists, and worried about social oblivion of their sacrifice for educational democratization. Even the dismissed teachers were recognized as teachers of educational democratization merit by government, but they took entire responsibility of many disadvantages from dismissal. Memory studies on the dismissal event are expected to understand the nature and meaning of the Korean teacher movement, and to provide useful implications for research on students and parents movement.