The aim of this study is to investigate the conversion of Dongnaebu Gaeksa block to public market during Japan’s Colonial Period. The block of Gaeksa was converted into the elementary school for the first time and afterwards occupied by the public market. Dongnae Traditional Market(五日場) had kept up since late 18th century. Dongnae public market was transferred to the site of Dongnaebu Gaeksa in 1937. Especially Dongnae public market(東萊公設市場) in the construction cost of establishment was supplied on loan. A number of traditional markets were reformed into the public markets in the 1930s. and the public market was installed more by the organization of colonial period. Dongnae public market was one of those markets, too. Eventually the establishment of public market meant that the block of Gaeksa had disappeared completely.