This study estimates gender wage gap by the Korean industries. The empirical findings are as follows: 1. The sex segregation by industries has not improved. 2. The average wage in $ulcorner$electricity, transportation, warehousing, financial institutions$lrcorner$ is relatively higher than others. On the contrary, the average wage in $ulcorner$mining and manufacturing$lrcorner$ and $ulcorner$wholesale and retail, food, loading$lrcorner$ is relatively lower than others. 3. The gender wage gap in $ulcorner$electricity, transportation, warehousing, financial institutions$lrcorner$ is relatively lower than others. On the contrary, the gender wage gap in $ulcorner$mining and manufacturing$lrcorner$ is relatively higher than others. The gender wage gap has declined annually. The gender wage gap in industries with lower wage level is higher. The decline of gender wage gap cannot be interpreted as a relaxation of sexual discrimination.